Upgraded to Elgg 1.8.4.

61 files changed, 2179 insertions, 498 deletions

diff --git a/engine/classes/ElggBatch.php b/engine/classes/ElggBatch.php
index 3d01133fa..0cb13eb32 100644
--- a/engine/classes/ElggBatch.php
+++ b/engine/classes/ElggBatch.php
@@ -3,47 +3,51 @@
  * Efficiently run operations on batches of results for any function
  * that supports an options array.
  *
- * This is usually used with elgg_get_entities() and friends, elgg_get_annotations()
- * and elgg_get_metadata().
+ * This is usually used with elgg_get_entities() and friends,
+ * elgg_get_annotations(), and elgg_get_metadata().
  *
- * If you pass a valid PHP callback, all results will be run through that callback.
- * You can still foreach() through the result set after.  Valid PHP callbacks
- * can be a string, an array, or a closure.
+ * If you pass a valid PHP callback, all results will be run through that
+ * callback. You can still foreach() through the result set after.  Valid
+ * PHP callbacks can be a string, an array, or a closure.
  * {@link http://php.net/manual/en/language.pseudo-types.php}
  *
- * The callback function must accept 3 arguments: an entity, the getter used, and the options used.
+ * The callback function must accept 3 arguments: an entity, the getter
+ * used, and the options used.
  *
- * Results from the callback are stored in callbackResult.
- * If the callback returns only booleans, callbackResults will be the combined
- * result of all calls.
+ * Results from the callback are stored in callbackResult. If the callback
+ * returns only booleans, callbackResults will be the combined result of
+ * all calls.
  *
- * If the callback returns anything else, callbackresult will be an indexed array
- * of whatever the callback returns.  If returning error handling information,
- * you should include enough information to determine which result you're referring
- * to.
+ * If the callback returns anything else, callbackresult will be an indexed
+ * array of whatever the callback returns.  If returning error handling
+ * information, you should include enough information to determine which
+ * result you're referring to.
  *
  * Don't combine returning bools and returning something else.
  *
  * Note that returning false will not stop the foreach.
  *
+ * @warning If your callback or foreach loop deletes or disable entities
+ * you MUST call setIncrementOffset(false) or set that when instantiating.
+ * This forces the offset to stay what it was in the $options array.
+ *
  * @example
  * <code>
+ * // using foreach
  * $batch = new ElggBatch('elgg_get_entities', array());
+ * $batch->setIncrementOffset(false);
  *
  * foreach ($batch as $entity) {
  * 	$entity->disable();
  * }
  *
+ * // using both a callback
  * $callback = function($result, $getter, $options) {
- * 	var_dump("Going to delete annotation id: $result->id");
+ * 	var_dump("Looking at annotation id: $result->id");
  *  return true;
  * }
  *
  * $batch = new ElggBatch('elgg_get_annotations', array('guid' => 2), $callback);
- *
- * foreach ($batch as $annotation) {
- * 	$annotation->delete();
- * }
  * </code>
  *
  * @package    Elgg.Core
@@ -139,6 +143,13 @@ class ElggBatch
 	public $callbackResult = null;
 
 	/**
+	 * If false, offset will not be incremented. This is used for callbacks/loops that delete.
+	 *
+	 * @var bool
+	 */
+	private $incrementOffset = true;
+
+	/**
 	 * Batches operations on any elgg_get_*() or compatible function that supports
 	 * an options array.
 	 *
@@ -156,12 +167,18 @@ class ElggBatch
 	 * @param int    $chunk_size The number of entities to pull in before requesting more.
 	 *                           You have to balance this between running out of memory in PHP
 	 *                           and hitting the db server too often.
+	 * @param bool   $inc_offset Increment the offset on each fetch. This must be false for
+	 *                           callbacks that delete rows. You can set this after the
+	 *                           object is created with {@see ElggBatch::setIncrementOffset()}.
 	 */
-	public function __construct($getter, $options, $callback = null, $chunk_size = 25) {
+	public function __construct($getter, $options, $callback = null, $chunk_size = 25,
+			$inc_offset = true) {
+		
 		$this->getter = $getter;
 		$this->options = $options;
 		$this->callback = $callback;
 		$this->chunkSize = $chunk_size;
+		$this->setIncrementOffset($inc_offset);
 
 		if ($this->chunkSize <= 0) {
 			$this->chunkSize = 25;
@@ -174,7 +191,7 @@ class ElggBatch
 		// if passed a callback, create a new ElggBatch with the same options
 		// and pass each to the callback.
 		if ($callback && is_callable($callback)) {
-			$batch = new ElggBatch($getter, $options, null, $chunk_size);
+			$batch = new ElggBatch($getter, $options, null, $chunk_size, $inc_offset);
 
 			$all_results = null;
 
@@ -245,9 +262,15 @@ class ElggBatch
 			}
 		}
 
+		if ($this->incrementOffset) {
+			$offset = $this->offset + $this->retrievedResults;
+		} else {
+			$offset = $this->offset;
+		}
+
 		$current_options = array(
 			'limit' => $limit,
-			'offset' => $this->offset + $this->retrievedResults
+			'offset' => $offset
 		);
 
 		$options = array_merge($this->options, $current_options);
@@ -270,6 +293,16 @@ class ElggBatch
 	}
 
 	/**
+	 * Increment the offset from the original options array? Setting to
+	 * false is required for callbacks that delete rows.
+	 *
+	 * @param bool $increment
+	 */
+	public function setIncrementOffset($increment = true) {
+		$this->incrementOffset = (bool) $increment;
+	}
+
+	/**
 	 * Implements Iterator
 	 */
 
diff --git a/engine/classes/ElggEntity.php b/engine/classes/ElggEntity.php
index 2fa8e9939..dc38dafbe 100644
--- a/engine/classes/ElggEntity.php
+++ b/engine/classes/ElggEntity.php
@@ -1311,12 +1311,16 @@ abstract class ElggEntity extends ElggData implements
 	/**
 	 * Loads attributes from the entities table into the object.
 	 *
-	 * @param int $guid GUID of Entity
+	 * @param mixed $guid GUID of entity or stdClass object from entities table
 	 *
 	 * @return bool
 	 */
 	protected function load($guid) {
-		$row = get_entity_as_row($guid);
+		if ($guid instanceof stdClass) {
+			$row = $guid;
+		} else {
+			$row = get_entity_as_row($guid);
+		}
 
 		if ($row) {
 			// Create the array if necessary - all subclasses should test before creating
diff --git a/engine/classes/ElggFileCache.php b/engine/classes/ElggFileCache.php
index 8304372dc..34178d452 100644
--- a/engine/classes/ElggFileCache.php
+++ b/engine/classes/ElggFileCache.php
@@ -161,12 +161,25 @@ class ElggFileCache extends ElggCache {
 	}
 
 	/**
-	 * This was probably meant to delete everything?
+	 * Delete all files in the directory of this file cache
 	 *
 	 * @return void
 	 */
 	public function clear() {
-		// @todo writeme
+		$dir = $this->getVariable("cache_path");
+
+		$exclude = array(".", "..");
+
+		$files = scandir($dir);
+		if (!$files) {
+			return;
+		}
+
+		foreach ($files as $f) {
+			if (!in_array($f, $exclude)) {
+				unlink($dir . $f);
+			}
+		}
 	}
 
 	/**
@@ -184,7 +197,7 @@ class ElggFileCache extends ElggCache {
 			return;
 		}
 
-		$exclude = array(".","..");
+		$exclude = array(".", "..");
 
 		$files = scandir($dir);
 		if (!$files) {
diff --git a/engine/classes/ElggGroup.php b/engine/classes/ElggGroup.php
index ab223e1a4..f7f67bf41 100644
--- a/engine/classes/ElggGroup.php
+++ b/engine/classes/ElggGroup.php
@@ -29,12 +29,12 @@ class ElggGroup extends ElggEntity
 	}
 
 	/**
-	 * Construct a new user entity, optionally from a given id value.
+	 * Construct a new group entity, optionally from a given guid value.
 	 *
 	 * @param mixed $guid If an int, load that GUID.
-	 * 	If a db row then will attempt to load the rest of the data.
+	 * 	If an entity table db row, then will load the rest of the data.
 	 *
-	 * @throws Exception if there was a problem creating the user.
+	 * @throws Exception if there was a problem creating the group.
 	 */
 	function __construct($guid = null) {
 		$this->initializeAttributes();
@@ -43,15 +43,15 @@ class ElggGroup extends ElggEntity
 		$this->initialise_attributes(false);
 
 		if (!empty($guid)) {
-			// Is $guid is a DB row - either a entity row, or a user table row.
+			// Is $guid is a entity table DB row
 			if ($guid instanceof stdClass) {
 				// Load the rest
-				if (!$this->load($guid->guid)) {
+				if (!$this->load($guid)) {
 					$msg = elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid->guid));
 					throw new IOException($msg);
 				}
 
-				// Is $guid is an ElggGroup? Use a copy constructor
+			// Is $guid is an ElggGroup? Use a copy constructor
 			} else if ($guid instanceof ElggGroup) {
 				elgg_deprecated_notice('This type of usage of the ElggGroup constructor was deprecated. Please use the clone method.', 1.7);
 
@@ -59,11 +59,11 @@ class ElggGroup extends ElggEntity
 					$this->attributes[$key] = $value;
 				}
 
-				// Is this is an ElggEntity but not an ElggGroup = ERROR!
+			// Is this is an ElggEntity but not an ElggGroup = ERROR!
 			} else if ($guid instanceof ElggEntity) {
 				throw new InvalidParameterException(elgg_echo('InvalidParameterException:NonElggGroup'));
 
-				// We assume if we have got this far, $guid is an int
+			// Is it a GUID
 			} else if (is_numeric($guid)) {
 				if (!$this->load($guid)) {
 					throw new IOException(elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid)));
@@ -319,11 +319,9 @@ class ElggGroup extends ElggEntity
 	}
 
 	/**
-	 * Override the load function.
-	 * This function will ensure that all data is loaded (were possible), so
-	 * if only part of the ElggGroup is loaded, it'll load the rest.
+	 * Load the ElggGroup data from the database
 	 *
-	 * @param int $guid GUID of an ElggGroup entity
+	 * @param mixed $guid GUID of an ElggGroup entity or database row from entity table
 	 *
 	 * @return bool
 	 */
@@ -333,6 +331,11 @@ class ElggGroup extends ElggEntity
 			return false;
 		}
 
+		// Only work with GUID from here
+		if ($guid instanceof stdClass) {
+			$guid = $guid->guid;
+		}
+
 		// Check the type
 		if ($this->attributes['type'] != 'group') {
 			$msg = elgg_echo('InvalidClassException:NotValidElggStar', array($guid, get_class()));
diff --git a/engine/classes/ElggObject.php b/engine/classes/ElggObject.php
index 649e32490..b4bae6825 100644
--- a/engine/classes/ElggObject.php
+++ b/engine/classes/ElggObject.php
@@ -41,12 +41,12 @@ class ElggObject extends ElggEntity {
 	 *
 	 * If no arguments are passed, create a new entity.
 	 *
-	 * If an argument is passed attempt to load a full Object entity.  Arguments
-	 * can be:
+	 * If an argument is passed, attempt to load a full ElggObject entity.
+	 * Arguments can be:
 	 *  - The GUID of an object entity.
-	 *  - A DB result object with a guid property
+	 *  - A DB result object from the entities table with a guid property
 	 *
-	 * @param mixed $guid If an int, load that GUID.  If a db row then will attempt to
+	 * @param mixed $guid If an int, load that GUID.  If a db row, then will attempt to
 	 * load the rest of the data.
 	 *
 	 * @throws IOException If passed an incorrect guid
@@ -59,15 +59,15 @@ class ElggObject extends ElggEntity {
 		$this->initialise_attributes(false);
 
 		if (!empty($guid)) {
-			// Is $guid is a DB row - either a entity row, or a object table row.
+			// Is $guid is a DB row from the entity table
 			if ($guid instanceof stdClass) {
 				// Load the rest
-				if (!$this->load($guid->guid)) {
+				if (!$this->load($guid)) {
 					$msg = elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid->guid));
 					throw new IOException($msg);
 				}
 
-				// Is $guid is an ElggObject? Use a copy constructor
+			// Is $guid is an ElggObject? Use a copy constructor
 			} else if ($guid instanceof ElggObject) {
 				elgg_deprecated_notice('This type of usage of the ElggObject constructor was deprecated. Please use the clone method.', 1.7);
 
@@ -75,11 +75,11 @@ class ElggObject extends ElggEntity {
 					$this->attributes[$key] = $value;
 				}
 
-				// Is this is an ElggEntity but not an ElggObject = ERROR!
+			// Is this is an ElggEntity but not an ElggObject = ERROR!
 			} else if ($guid instanceof ElggEntity) {
 				throw new InvalidParameterException(elgg_echo('InvalidParameterException:NonElggObject'));
 
-				// We assume if we have got this far, $guid is an int
+			// Is it a GUID
 			} else if (is_numeric($guid)) {
 				if (!$this->load($guid)) {
 					throw new IOException(elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid)));
@@ -93,17 +93,22 @@ class ElggObject extends ElggEntity {
 	/**
 	 * Loads the full ElggObject when given a guid.
 	 *
-	 * @param int $guid Guid of an ElggObject
+	 * @param mixed $guid GUID of an ElggObject or the stdClass object from entities table
 	 *
 	 * @return bool
 	 * @throws InvalidClassException
 	 */
 	protected function load($guid) {
-		// Test to see if we have the generic stuff
+		// Load data from entity table if needed
 		if (!parent::load($guid)) {
 			return false;
 		}
 
+		// Only work with GUID from here
+		if ($guid instanceof stdClass) {
+			$guid = $guid->guid;
+		}
+
 		// Check the type
 		if ($this->attributes['type'] != 'object') {
 			$msg = elgg_echo('InvalidClassException:NotValidElggStar', array($guid, get_class()));
diff --git a/engine/classes/ElggPluginManifest.php b/engine/classes/ElggPluginManifest.php
index 7592eb667..7aa702d47 100644
--- a/engine/classes/ElggPluginManifest.php
+++ b/engine/classes/ElggPluginManifest.php
@@ -592,4 +592,23 @@ class ElggPluginManifest {
 
 		return $return;
 	}
+
+	/**
+	 * Returns a category's friendly name. This can be localized by
+	 * defining the string 'admin:plugins:category:<category>'. If no
+	 * localization is found, returns the category with _ and - converted to ' '
+	 * and then ucwords()'d.
+	 *
+	 * @param str $category The category as defined in the manifest.
+	 * @return str A human-readable category
+	 */
+	static public function getFriendlyCategory($category) {
+		$cat_raw_string = "admin:plugins:category:$category";
+		$cat_display_string = elgg_echo($cat_raw_string);
+		if ($cat_display_string == $cat_raw_string) {
+			$category = str_replace(array('-', '_'), ' ', $category);
+			$cat_display_string = ucwords($category);
+		}
+		return $cat_display_string;
+	}
 }
diff --git a/engine/classes/ElggSite.php b/engine/classes/ElggSite.php
index ac0c87bf7..6d07778a9 100644
--- a/engine/classes/ElggSite.php
+++ b/engine/classes/ElggSite.php
@@ -57,8 +57,8 @@ class ElggSite extends ElggEntity {
 	 *  - A URL as stored in ElggSite->url
 	 *  - A DB result object with a guid property
 	 *
-	 * @param mixed $guid If an int, load that GUID.  If a db row then will attempt
-	 * to load the rest of the data.
+	 * @param mixed $guid If an int, load that GUID.  If a db row then will
+	 * load the rest of the data.
 	 *
 	 * @throws IOException If passed an incorrect guid
 	 * @throws InvalidParameterException If passed an Elgg* Entity that isn't an ElggSite
@@ -70,15 +70,15 @@ class ElggSite extends ElggEntity {
 		$this->initialise_attributes(false);
 
 		if (!empty($guid)) {
-			// Is $guid is a DB row - either a entity row, or a site table row.
+			// Is $guid is a DB entity table row
 			if ($guid instanceof stdClass) {
 				// Load the rest
-				if (!$this->load($guid->guid)) {
+				if (!$this->load($guid)) {
 					$msg = elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid->guid));
 					throw new IOException($msg);
 				}
 
-				// Is $guid is an ElggSite? Use a copy constructor
+			// Is $guid is an ElggSite? Use a copy constructor
 			} else if ($guid instanceof ElggSite) {
 				elgg_deprecated_notice('This type of usage of the ElggSite constructor was deprecated. Please use the clone method.', 1.7);
 
@@ -86,18 +86,18 @@ class ElggSite extends ElggEntity {
 					$this->attributes[$key] = $value;
 				}
 
-				// Is this is an ElggEntity but not an ElggSite = ERROR!
+			// Is this is an ElggEntity but not an ElggSite = ERROR!
 			} else if ($guid instanceof ElggEntity) {
 				throw new InvalidParameterException(elgg_echo('InvalidParameterException:NonElggSite'));
 
-				// See if this is a URL
+			// See if this is a URL
 			} else if (strpos($guid, "http") !== false) {
 				$guid = get_site_by_url($guid);
 				foreach ($guid->attributes as $key => $value) {
 					$this->attributes[$key] = $value;
 				}
 
-				// We assume if we have got this far, $guid is an int
+			// Is it a GUID
 			} else if (is_numeric($guid)) {
 				if (!$this->load($guid)) {
 					throw new IOException(elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid)));
@@ -111,7 +111,7 @@ class ElggSite extends ElggEntity {
 	/**
 	 * Loads the full ElggSite when given a guid.
 	 *
-	 * @param int $guid Guid of ElggSite entity
+	 * @param mixed $guid GUID of ElggSite entity or database row object
 	 *
 	 * @return bool
 	 * @throws InvalidClassException
@@ -122,6 +122,11 @@ class ElggSite extends ElggEntity {
 			return false;
 		}
 
+		// Only work with GUID from here
+		if ($guid instanceof stdClass) {
+			$guid = $guid->guid;
+		}
+
 		// Check the type
 		if ($this->attributes['type'] != 'site') {
 			$msg = elgg_echo('InvalidClassException:NotValidElggStar', array($guid, get_class()));
@@ -417,6 +422,7 @@ class ElggSite extends ElggEntity {
 
 		// default public pages
 		$defaults = array(
+			'walled_garden/.*',
 			'action/login',
 			'register',
 			'action/register',
@@ -427,10 +433,14 @@ class ElggSite extends ElggEntity {
 			'action/security/refreshtoken',
 			'ajax/view/js/languages',
 			'upgrade\.php',
+			'xml-rpc\.php',
+			'mt/mt-xmlrpc\.cgi',
 			'css/.*',
 			'js/.*',
 			'cache/css/.*',
 			'cache/js/.*',
+			'cron/.*',
+			'services/.*',
 		);
 
 		// include a hook for plugin authors to include public pages
diff --git a/engine/classes/ElggUser.php b/engine/classes/ElggUser.php
index bdf57c2c3..d7bb89265 100644
--- a/engine/classes/ElggUser.php
+++ b/engine/classes/ElggUser.php
@@ -47,7 +47,7 @@ class ElggUser extends ElggEntity
 	 * Construct a new user entity, optionally from a given id value.
 	 *
 	 * @param mixed $guid If an int, load that GUID.
-	 * 	If a db row then will attempt to load the rest of the data.
+	 * 	If an entity table db row then will load the rest of the data.
 	 *
 	 * @throws Exception if there was a problem creating the user.
 	 */
@@ -58,15 +58,15 @@ class ElggUser extends ElggEntity
 		$this->initialise_attributes(false);
 
 		if (!empty($guid)) {
-			// Is $guid is a DB row - either a entity row, or a user table row.
+			// Is $guid is a DB entity row
 			if ($guid instanceof stdClass) {
 				// Load the rest
-				if (!$this->load($guid->guid)) {
+				if (!$this->load($guid)) {
 					$msg = elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid->guid));
 					throw new IOException($msg);
 				}
 
-				// See if this is a username
+			// See if this is a username
 			} else if (is_string($guid)) {
 				$user = get_user_by_username($guid);
 				if ($user) {
@@ -75,7 +75,7 @@ class ElggUser extends ElggEntity
 					}
 				}
 
-				// Is $guid is an ElggUser? Use a copy constructor
+			// Is $guid is an ElggUser? Use a copy constructor
 			} else if ($guid instanceof ElggUser) {
 				elgg_deprecated_notice('This type of usage of the ElggUser constructor was deprecated. Please use the clone method.', 1.7);
 
@@ -83,11 +83,11 @@ class ElggUser extends ElggEntity
 					$this->attributes[$key] = $value;
 				}
 
-				// Is this is an ElggEntity but not an ElggUser = ERROR!
+			// Is this is an ElggEntity but not an ElggUser = ERROR!
 			} else if ($guid instanceof ElggEntity) {
 				throw new InvalidParameterException(elgg_echo('InvalidParameterException:NonElggUser'));
 
-				// We assume if we have got this far, $guid is an int
+			// Is it a GUID
 			} else if (is_numeric($guid)) {
 				if (!$this->load($guid)) {
 					throw new IOException(elgg_echo('IOException:FailedToLoadGUID', array(get_class(), $guid)));
@@ -99,11 +99,9 @@ class ElggUser extends ElggEntity
 	}
 
 	/**
-	 * Override the load function.
-	 * This function will ensure that all data is loaded (were possible), so
-	 * if only part of the ElggUser is loaded, it'll load the rest.
+	 * Load the ElggUser data from the database
 	 *
-	 * @param int $guid ElggUser GUID
+	 * @param mixed $guid ElggUser GUID or stdClass database row from entity table
 	 *
 	 * @return bool
 	 */
@@ -113,6 +111,11 @@ class ElggUser extends ElggEntity
 			return false;
 		}
 
+		// Only work with GUID from here
+		if ($guid instanceof stdClass) {
+			$guid = $guid->guid;
+		}
+
 		// Check the type
 		if ($this->attributes['type'] != 'user') {
 			$msg = elgg_echo('InvalidClassException:NotValidElggStar', array($guid, get_class()));
@@ -384,7 +387,6 @@ class ElggUser extends ElggEntity
 			'relationship' => 'friend',
 			'relationship_guid' => $this->guid,
 			'limit' => $limit,
-			'offset' => get_input('offset', 0),
 			'full_view' => false,
 		);
 
@@ -458,7 +460,14 @@ class ElggUser extends ElggEntity
 	 * @return array|false
 	 */
 	public function getObjects($subtype = "", $limit = 10, $offset = 0) {
-		return get_user_objects($this->getGUID(), $subtype, $limit, $offset);
+		$params = array(
+			'type' => 'object',
+			'subtype' => $subtype,
+			'owner_guid' => $this->getGUID(),
+			'limit' => $limit,
+			'offset' => $offset
+		);
+		return elgg_get_entities($params);
 	}
 
 	/**
diff --git a/engine/classes/ElggWidget.php b/engine/classes/ElggWidget.php
index 7914fa140..99708f66a 100644
--- a/engine/classes/ElggWidget.php
+++ b/engine/classes/ElggWidget.php
@@ -131,11 +131,21 @@ class ElggWidget extends ElggObject {
 
 		usort($widgets, create_function('$a,$b','return (int)$a->order > (int)$b->order;'));
 
+		// remove widgets from inactive plugins
+		$widget_types = elgg_get_widget_types($this->context);
+		$inactive_widgets = array();
+		foreach ($widgets as $index => $widget) {
+			if (!array_key_exists($widget->handler, $widget_types)) {
+				$inactive_widgets[] = $widget;
+				unset($widgets[$index]);
+			}
+		}
+
 		if ($rank == 0) {
 			// top of the column
-			$this->order = $widgets[0]->order - 10;
+			$this->order = reset($widgets)->order - 10;
 		} elseif ($rank == (count($widgets) - 1)) {
-			// bottom of the column
+			// bottom of the column of active widgets
 			$this->order = end($widgets)->order + 10;
 		} else {
 			// reorder widgets
@@ -147,7 +157,7 @@ class ElggWidget extends ElggObject {
 				}
 			}
 
-			// split the array in two and recombine with the moved array in middle
+			// split the array in two and recombine with the moved widget in middle
 			$before = array_slice($widgets, 0, $rank);
 			array_push($before, $this);
 			$after = array_slice($widgets, $rank);
@@ -159,6 +169,22 @@ class ElggWidget extends ElggObject {
 				$order += 10;
 			}
 		}
+
+		// put inactive widgets at the bottom
+		if ($inactive_widgets) {
+			$bottom = 0;
+			foreach ($widgets as $widget) {
+				if ($widget->order > $bottom) {
+					$bottom = $widget->order;
+				}
+			}
+			$bottom += 10;
+			foreach ($inactive_widgets as $widget) {
+				$widget->order = $bottom;
+				$bottom += 10;
+			}
+		}
+
 		$this->column = $column;
 	}
 
diff --git a/engine/classes/XMLRPCArrayParameter.php b/engine/classes/XMLRPCArrayParameter.php
new file mode 100644
index 000000000..a8edccba7
--- /dev/null
+++ b/engine/classes/XMLRPCArrayParameter.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * An array containing other XMLRPCParameter objects.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ *
+ */
+class XMLRPCArrayParameter extends XMLRPCParameter
+{
+	/**
+	 * Construct an array.
+	 *
+	 * @param array $parameters Optional array of parameters, if not provided
+	 * then addField must be used.
+	 */
+	function __construct($parameters = NULL) {
+		parent::__construct();
+
+		if (is_array($parameters)) {
+			foreach ($parameters as $v) {
+				$this->addField($v);
+			}
+		}
+	}
+
+	/**
+	 * Add a field to the container.
+	 *
+	 * @param XMLRPCParameter $value The value.
+	 *
+	 * @return void
+	 */
+	public function addField(XMLRPCParameter $value) {
+		if (!is_array($this->value)) {
+			$this->value = array();
+		}
+
+		$this->value[] = $value;
+	}
+
+	/**
+	 * Converts XML array to string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		$params = "";
+		foreach ($this->value as $value) {
+			$params .= "$value";
+		}
+
+		return "<array><data>$params</data></array>";
+	}
+}
diff --git a/engine/classes/XMLRPCBase64Parameter.php b/engine/classes/XMLRPCBase64Parameter.php
new file mode 100644
index 000000000..7db0a761c
--- /dev/null
+++ b/engine/classes/XMLRPCBase64Parameter.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * A base 64 encoded blob of binary.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCBase64Parameter extends XMLRPCParameter {
+	/**
+	 * Construct a base64 encoded block
+	 *
+	 * @param string $blob Unencoded binary blob
+	 */
+	function __construct($blob) {
+		parent::__construct();
+
+		$this->value = base64_encode($blob);
+	}
+
+	/**
+	 * Convert to string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		return "<value><base64>{$value}</base64></value>";
+	}
+}
diff --git a/engine/classes/XMLRPCBoolParameter.php b/engine/classes/XMLRPCBoolParameter.php
new file mode 100644
index 000000000..607841cb8
--- /dev/null
+++ b/engine/classes/XMLRPCBoolParameter.php
@@ -0,0 +1,30 @@
+<?php
+/**
+ * A boolean.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCBoolParameter extends XMLRPCParameter {
+
+	/**
+	 * New bool parameter
+	 *
+	 * @param bool $value Value
+	 */
+	function __construct($value) {
+		parent::__construct();
+
+		$this->value = (bool)$value;
+	}
+
+	/**
+	 * Convert to string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		$code = ($this->value) ? "1" : "0";
+		return "<value><boolean>{$code}</boolean></value>";
+	}
+}
diff --git a/engine/classes/XMLRPCDateParameter.php b/engine/classes/XMLRPCDateParameter.php
new file mode 100644
index 000000000..93bbbd8f5
--- /dev/null
+++ b/engine/classes/XMLRPCDateParameter.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * An ISO8601 data and time.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCDateParameter extends XMLRPCParameter {
+	/**
+	 * Construct a date
+	 *
+	 * @param int $timestamp The unix timestamp, or blank for "now".
+	 */
+	function __construct($timestamp = 0) {
+		parent::__construct();
+
+		$this->value = $timestamp;
+
+		if (!$timestamp) {
+			$this->value = time();
+		}
+	}
+
+	/**
+	 * Convert to string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		$value = date('c', $this->value);
+		return "<value><dateTime.iso8601>{$value}</dateTime.iso8601></value>";
+	}
+}
diff --git a/engine/classes/XMLRPCDoubleParameter.php b/engine/classes/XMLRPCDoubleParameter.php
new file mode 100644
index 000000000..b7834650e
--- /dev/null
+++ b/engine/classes/XMLRPCDoubleParameter.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * A double precision signed floating point number.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCDoubleParameter extends XMLRPCParameter {
+
+	/**
+	 * New XML Double
+	 *
+	 * @param int $value Value
+	 */
+	function __construct($value) {
+		parent::__construct();
+
+		$this->value = (float)$value;
+	}
+
+	/**
+	 * Convert to string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		return "<value><double>{$this->value}</double></value>";
+	}
+}
diff --git a/engine/classes/XMLRPCErrorResponse.php b/engine/classes/XMLRPCErrorResponse.php
new file mode 100644
index 000000000..425c075cc
--- /dev/null
+++ b/engine/classes/XMLRPCErrorResponse.php
@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * XMLRPC Error Response
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCErrorResponse extends XMLRPCResponse {
+	/**
+	 * Set the error response and error code.
+	 *
+	 * @param string $message The message
+	 * @param int    $code    Error code (default = system error as defined by
+	 *                        http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php)
+	 */
+	function __construct($message, $code = -32400) {
+		$this->addParameter(
+			new XMLRPCStructParameter(
+				array (
+					'faultCode' => new XMLRPCIntParameter($code),
+					'faultString' => new XMLRPCStringParameter($message)
+				)
+			)
+		);
+	}
+
+	/**
+	 * Output to XML.
+	 *
+	 * @return string
+	 */
+	public function __toString() {
+		return "<methodResponse><fault><value>{$this->parameters[0]}</value></fault></methodResponse>";
+	}
+}
diff --git a/engine/classes/XMLRPCIntParameter.php b/engine/classes/XMLRPCIntParameter.php
new file mode 100644
index 000000000..0fc146165
--- /dev/null
+++ b/engine/classes/XMLRPCIntParameter.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * An Integer.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCIntParameter extends XMLRPCParameter {
+
+	/**
+	 * A new XML int
+	 *
+	 * @param int $value Value
+	 */
+	function __construct($value) {
+		parent::__construct();
+
+		$this->value = (int)$value;
+	}
+
+	/**
+	 * Convert to string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		return "<value><i4>{$this->value}</i4></value>";
+	}
+}
diff --git a/engine/classes/XMLRPCParameter.php b/engine/classes/XMLRPCParameter.php
new file mode 100644
index 000000000..ffbad8082
--- /dev/null
+++ b/engine/classes/XMLRPCParameter.php
@@ -0,0 +1,16 @@
+<?php
+/**
+ * Superclass for all RPC parameters.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+abstract class XMLRPCParameter {
+	protected $value;
+
+	/**
+	 * Set initial values
+	 */
+	function __construct() { }
+
+}
diff --git a/engine/classes/XMLRPCResponse.php b/engine/classes/XMLRPCResponse.php
new file mode 100644
index 000000000..a6256d385
--- /dev/null
+++ b/engine/classes/XMLRPCResponse.php
@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * XML-RPC Response.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+abstract class XMLRPCResponse {
+	/** An array of parameters */
+	protected $parameters = array();
+
+	/**
+	 * Add a parameter here.
+	 *
+	 * @param XMLRPCParameter $param The parameter.
+	 *
+	 * @return void
+	 */
+	public function addParameter(XMLRPCParameter $param) {
+		if (!is_array($this->parameters)) {
+			$this->parameters = array();
+		}
+
+		$this->parameters[] = $param;
+	}
+
+	/**
+	 * Add an integer
+	 *
+	 * @param int $value Value
+	 *
+	 * @return void
+	 */
+	public function addInt($value) {
+		$this->addParameter(new XMLRPCIntParameter($value));
+	}
+
+	/**
+	 * Add a string
+	 *
+	 * @param string $value Value
+	 *
+	 * @return void
+	 */
+	public function addString($value) {
+		$this->addParameter(new XMLRPCStringParameter($value));
+	}
+
+	/**
+	 * Add a double
+	 *
+	 * @param int $value Value
+	 *
+	 * @return void
+	 */
+	public function addDouble($value) {
+		$this->addParameter(new XMLRPCDoubleParameter($value));
+	}
+
+	/**
+	 * Add a boolean
+	 *
+	 * @param bool $value Value
+	 *
+	 * @return void
+	 */
+	public function addBoolean($value) {
+		$this->addParameter(new XMLRPCBoolParameter($value));
+	}
+}
diff --git a/engine/classes/XMLRPCStringParameter.php b/engine/classes/XMLRPCStringParameter.php
new file mode 100644
index 000000000..35b28214b
--- /dev/null
+++ b/engine/classes/XMLRPCStringParameter.php
@@ -0,0 +1,30 @@
+<?php
+/**
+ * A string.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCStringParameter extends XMLRPCParameter {
+
+	/**
+	 * A new XML string
+	 *
+	 * @param string $value Value
+	 */
+	function __construct($value) {
+		parent::__construct();
+
+		$this->value = $value;
+	}
+
+	/**
+	 * Convert to XML string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		$value = htmlentities($this->value);
+		return "<value><string>{$value}</string></value>";
+	}
+}
diff --git a/engine/classes/XMLRPCStructParameter.php b/engine/classes/XMLRPCStructParameter.php
new file mode 100644
index 000000000..694ddf5df
--- /dev/null
+++ b/engine/classes/XMLRPCStructParameter.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * A structure containing other XMLRPCParameter objects.
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCStructParameter extends XMLRPCParameter {
+	/**
+	 * Construct a struct.
+	 *
+	 * @param array $parameters Optional associated array of parameters, if
+	 * not provided then addField must be used.
+	 */
+	function __construct($parameters = NULL) {
+		parent::__construct();
+
+		if (is_array($parameters)) {
+			foreach ($parameters as $k => $v) {
+				$this->addField($k, $v);
+			}
+		}
+	}
+
+	/**
+	 * Add a field to the container.
+	 *
+	 * @param string          $name  The name of the field.
+	 * @param XMLRPCParameter $value The value.
+	 *
+	 * @return void
+	 */
+	public function addField($name, XMLRPCParameter $value) {
+		if (!is_array($this->value)) {
+			$this->value = array();
+		}
+
+		$this->value[$name] = $value;
+	}
+
+	/**
+	 * Convert to string
+	 *
+	 * @return string
+	 */
+	function __toString() {
+		$params = "";
+		foreach ($this->value as $k => $v) {
+			$params .= "<member><name>$k</name>$v</member>";
+		}
+
+		return "<value><struct>$params</struct></value>";
+	}
+}
diff --git a/engine/classes/XMLRPCSuccessResponse.php b/engine/classes/XMLRPCSuccessResponse.php
new file mode 100644
index 000000000..e02e82c5c
--- /dev/null
+++ b/engine/classes/XMLRPCSuccessResponse.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ * Success Response
+ *
+ * @package    Elgg.Core
+ * @subpackage XMLRPC
+ */
+class XMLRPCSuccessResponse extends XMLRPCResponse {
+	/**
+	 * Output to XML.
+	 *
+	 * @return string
+	 */
+	public function __toString() {
+		$params = "";
+		foreach ($this->parameters as $param) {
+			$params .= "<param>$param</param>\n";
+		}
+
+		return "<methodResponse><params>$params</params></methodResponse>";
+	}
+}
diff --git a/engine/handlers/page_handler.php b/engine/handlers/page_handler.php
index 7eca37bb1..1ed295b7d 100644
--- a/engine/handlers/page_handler.php
+++ b/engine/handlers/page_handler.php
@@ -13,16 +13,12 @@
  *  * cache
  *  * services
  *  * export
- *  * js
- *  * css
+ *  * mt
+ *  * xml-rpc.php
  *  * rewrite.php
  *  * tag (deprecated, reserved for backwards compatibility)
  *  * pg (deprecated, reserved for backwards compatibility)
  *
- * These additionally are reserved for the xml-rpc plugin
- *  * mt
- *  * xml-rpc.php
- *
  * {@link page_handler()} explodes the pages string by / and sends it to
  * the page handler function as registered by {@link elgg_register_page_handler()}.
  * If a valid page handler isn't found, plugins have a chance to provide a 404.
diff --git a/engine/handlers/xml-rpc_handler.php b/engine/handlers/xml-rpc_handler.php
new file mode 100644
index 000000000..2ee29e5b7
--- /dev/null
+++ b/engine/handlers/xml-rpc_handler.php
@@ -0,0 +1,44 @@
+<?php
+/**
+ * XML-RPC handler.
+ *
+ * @warning This is very old code. Does it work at all?
+ *
+ * @package Elgg.Core
+ * @subpackage XMLRPC
+ * @link http://docs.elgg.org/Tutorials/XMLRPC
+ * @todo Does this work?
+ */
+
+require_once(dirname(dirname(__FILE__)) . "/start.php");
+
+// Register the error handler
+error_reporting(E_ALL);
+set_error_handler('_php_xmlrpc_error_handler');
+
+// Register a default exception handler
+set_exception_handler('_php_xmlrpc_exception_handler');
+
+// Set some defaults
+$result = null;
+set_input('view', 'xml'); // Set default view regardless
+
+// Get the post data
+$input = get_post_data();
+
+if ($input) {
+	// 	Parse structures from xml
+	$call = new XMLRPCCall($input);
+
+	// Process call
+	$result = trigger_xmlrpc_handler($call);
+} else {
+	throw new CallException(elgg_echo('xmlrpc:noinputdata'));
+}
+
+if (!($result instanceof XMLRPCResponse)) {
+	throw new APIException(elgg_echo('APIException:ApiResultUnknown'));
+}
+
+// Output result
+echo elgg_view_page("XML-RPC", elgg_view("xml-rpc/output", array('result' => $result)));
diff --git a/engine/lib/access.php b/engine/lib/access.php
index dba1e1ec6..6be252c6a 100644
--- a/engine/lib/access.php
+++ b/engine/lib/access.php
@@ -671,8 +671,10 @@ function add_user_to_access_collection($user_guid, $collection_id) {
 		return false;
 	}
 
+	// if someone tries to insert the same data twice, we do a no-op on duplicate key
 	$q = "INSERT INTO {$CONFIG->dbprefix}access_collection_membership
-			SET access_collection_id = {$collection_id}, user_guid = {$user_guid}";
+			SET access_collection_id = $collection_id, user_guid = $user_guid
+			ON DUPLICATE KEY UPDATE user_guid = user_guid";
 	$result = insert_data($q);
 
 	return $result !== false;
diff --git a/engine/lib/annotations.php b/engine/lib/annotations.php
index 5049d455b..f32dee0f0 100644
--- a/engine/lib/annotations.php
+++ b/engine/lib/annotations.php
@@ -209,9 +209,11 @@ function elgg_get_annotations(array $options = array()) {
  * Deletes annotations based on $options.
  *
  * @warning Unlike elgg_get_annotations() this will not accept an empty options array!
+ *          This requires at least one constraint: annotation_owner_guid(s),
+ *          annotation_name(s), annotation_value(s), or guid(s) must be set.
  *
  * @param array $options An options array. {@See elgg_get_annotations()}
- * @return mixed
+ * @return mixed Null if the metadata name is invalid. Bool on success or fail.
  * @since 1.8.0
  */
 function elgg_delete_annotations(array $options) {
diff --git a/engine/lib/cache.php b/engine/lib/cache.php
index e71ef332d..c117b9ec9 100644
--- a/engine/lib/cache.php
+++ b/engine/lib/cache.php
@@ -10,15 +10,14 @@
 /* Filepath Cache */
 
 /**
- * Returns an ElggCache object suitable for caching view
- * file load paths to disk under $CONFIG->dataroot.
+ * Returns an ElggCache object suitable for caching system information
  *
  * @todo Can this be done in a cleaner way?
  * @todo Swap to memcache etc?
  *
- * @return ElggFileCache A cache object suitable for caching file load paths.
+ * @return ElggFileCache
  */
-function elgg_get_filepath_cache() {
+function elgg_get_system_cache() {
 	global $CONFIG;
 
 	/**
@@ -27,36 +26,34 @@ function elgg_get_filepath_cache() {
 	static $FILE_PATH_CACHE;
 
 	if (!$FILE_PATH_CACHE) {
-		$FILE_PATH_CACHE = new ElggFileCache($CONFIG->dataroot);
+		$FILE_PATH_CACHE = new ElggFileCache($CONFIG->dataroot . 'system_cache/');
 	}
 
 	return $FILE_PATH_CACHE;
 }
 
 /**
- * Reset the file path cache.
+ * Reset the system cache by deleting the caches
  *
- * @return bool
+ * @return void
  */
-function elgg_filepath_cache_reset() {
-	$cache = elgg_get_filepath_cache();
-	$view_types_result = $cache->delete('view_types');
-	$views_result = $cache->delete('views');
-	return $view_types_result && $views_result;
+function elgg_reset_system_cache() {
+	$cache = elgg_get_system_cache();
+	$cache->clear();
 }
 
 /**
- * Saves a filepath cache.
+ * Saves a system cache.
  *
  * @param string $type The type or identifier of the cache
  * @param string $data The data to be saved
  * @return bool
  */
-function elgg_filepath_cache_save($type, $data) {
+function elgg_save_system_cache($type, $data) {
 	global $CONFIG;
 
-	if ($CONFIG->viewpath_cache_enabled) {
-		$cache = elgg_get_filepath_cache();
+	if ($CONFIG->system_cache_enabled) {
+		$cache = elgg_get_system_cache();
 		return $cache->save($type, $data);
 	}
 
@@ -64,16 +61,16 @@ function elgg_filepath_cache_save($type, $data) {
 }
 
 /**
- * Retrieve the contents of the filepath cache.
+ * Retrieve the contents of a system cache.
  *
  * @param string $type The type of cache to load
  * @return string
  */
-function elgg_filepath_cache_load($type) {
+function elgg_load_system_cache($type) {
 	global $CONFIG;
 
-	if ($CONFIG->viewpath_cache_enabled) {
-		$cache = elgg_get_filepath_cache();
+	if ($CONFIG->system_cache_enabled) {
+		$cache = elgg_get_system_cache();
 		$cached_data = $cache->load($type);
 
 		if ($cached_data) {
@@ -85,35 +82,74 @@ function elgg_filepath_cache_load($type) {
 }
 
 /**
- * Enables the views file paths disk cache.
+ * Enables the system disk cache.
  *
- * Uses the 'viewpath_cache_enabled' datalist with a boolean value.
- * Resets the views paths cache.
+ * Uses the 'system_cache_enabled' datalist with a boolean value.
+ * Resets the system cache.
  *
  * @return void
  */
-function elgg_enable_filepath_cache() {
+function elgg_enable_system_cache() {
 	global $CONFIG;
 
-	datalist_set('viewpath_cache_enabled', 1);
-	$CONFIG->viewpath_cache_enabled = 1;
-	elgg_filepath_cache_reset();
+	datalist_set('system_cache_enabled', 1);
+	$CONFIG->system_cache_enabled = 1;
+	elgg_reset_system_cache();
 }
 
 /**
- * Disables the views file paths disk cache.
+ * Disables the system disk cache.
  *
- * Uses the 'viewpath_cache_enabled' datalist with a boolean value.
- * Resets the views paths cache.
+ * Uses the 'system_cache_enabled' datalist with a boolean value.
+ * Resets the system cache.
  *
  * @return void
  */
-function elgg_disable_filepath_cache() {
+function elgg_disable_system_cache() {
 	global $CONFIG;
 
-	datalist_set('viewpath_cache_enabled', 0);
-	$CONFIG->viewpath_cache_enabled = 0;
-	elgg_filepath_cache_reset();
+	datalist_set('system_cache_enabled', 0);
+	$CONFIG->system_cache_enabled = 0;
+	elgg_reset_system_cache();
+}
+
+/** @todo deprecate in Elgg 1.9 **/
+
+/**
+ * @access private
+ */
+function elgg_get_filepath_cache() {
+	return elgg_get_system_cache();
+}
+/**
+ * @access private
+ */
+function elgg_filepath_cache_reset() {
+	return elgg_reset_system_cache();
+}
+/**
+ * @access private
+ */
+function elgg_filepath_cache_save($type, $data) {
+	return elgg_save_system_cache($type, $data);
+}
+/**
+ * @access private
+ */
+function elgg_filepath_cache_load($type) {
+	return elgg_load_system_cache($type);
+}
+/**
+ * @access private
+ */
+function elgg_enable_filepath_cache() {
+	return elgg_enable_system_cache();
+}
+/**
+ * @access private
+ */
+function elgg_disable_filepath_cache() {
+	return elgg_disable_system_cache();
 }
 
 /* Simplecache */
@@ -333,7 +369,7 @@ function elgg_invalidate_simplecache() {
 	$return = true;
 	while (false !== ($file = readdir($handle))) {
 		if ($file != "." && $file != "..") {
-			$return = $return && unlink($CONFIG->dataroot . 'views_simplecache/' . $file);
+			$return &= unlink($CONFIG->dataroot . 'views_simplecache/' . $file);
 		}
 	}
 	closedir($handle);
@@ -346,9 +382,70 @@ function elgg_invalidate_simplecache() {
 	}
 
 	foreach ($viewtypes as $viewtype) {
-		$return = $return && datalist_set("simplecache_lastupdate_$viewtype", 0);
-		$return = $return && datalist_set("simplecache_lastcached_$viewtype", 0);
+		$return &= datalist_set("simplecache_lastupdate_$viewtype", 0);
+		$return &= datalist_set("simplecache_lastcached_$viewtype", 0);
 	}
 
 	return $return;
 }
+
+/**
+ * @see elgg_reset_system_cache()
+ * @access private
+ */
+function _elgg_load_cache() {
+	global $CONFIG;
+
+	$CONFIG->system_cache_loaded = false;
+
+	$CONFIG->views = new stdClass();
+	$data = elgg_load_system_cache('view_locations');
+	if (!is_string($data)) {
+		return;
+	}
+	$CONFIG->views->locations = unserialize($data);
+	
+	$data = elgg_load_system_cache('view_types');
+	if (!is_string($data)) {
+		return;
+	}
+	$CONFIG->view_types = unserialize($data);
+
+	$CONFIG->system_cache_loaded = true;
+}
+
+/**
+ * @access private
+ */
+function _elgg_cache_init() {
+	global $CONFIG;
+
+	$viewtype = elgg_get_viewtype();
+
+	// Regenerate the simple cache if expired.
+	// Don't do it on upgrade because upgrade does it itself.
+	// @todo - move into function and perhaps run off init system event
+	if (!defined('UPGRADING')) {
+		$lastupdate = datalist_get("simplecache_lastupdate_$viewtype");
+		$lastcached = datalist_get("simplecache_lastcached_$viewtype");
+		if ($lastupdate == 0 || $lastcached < $lastupdate) {
+			elgg_regenerate_simplecache($viewtype);
+			$lastcached = datalist_get("simplecache_lastcached_$viewtype");
+		}
+		$CONFIG->lastcache = $lastcached;
+	}
+
+	// cache system data if enabled and not loaded
+	if ($CONFIG->system_cache_enabled && !$CONFIG->system_cache_loaded) {
+		elgg_save_system_cache('view_locations', serialize($CONFIG->views->locations));
+		elgg_save_system_cache('view_types', serialize($CONFIG->view_types));
+	}
+
+	if ($CONFIG->system_cache_enabled && !$CONFIG->i18n_loaded_from_cache) {
+		foreach ($CONFIG->translations as $lang => $map) {
+			elgg_save_system_cache("$lang.php", serialize($map));
+		}
+	}
+}
+
+elgg_register_event_handler('ready', 'system', '_elgg_cache_init');
diff --git a/engine/lib/calendar.php b/engine/lib/calendar.php
new file mode 100644
index 000000000..9a06c5292
--- /dev/null
+++ b/engine/lib/calendar.php
@@ -0,0 +1,571 @@
+<?php
+/**
+ * Elgg calendar / entity / event functions.
+ *
+ * @package    Elgg.Core
+ * @subpackage Calendar
+ *
+ * @todo Implement or remove
+ */
+
+/**
+ * Return a timestamp for the start of a given day (defaults today).
+ *
+ * @param int $day   Day
+ * @param int $month Month
+ * @param int $year  Year
+ *
+ * @return int
+ * @access private
+ */
+function get_day_start($day = null, $month = null, $year = null) {
+	return mktime(0, 0, 0, $month, $day, $year);
+}
+
+/**
+ * Return a timestamp for the end of a given day (defaults today).
+ *
+ * @param int $day   Day
+ * @param int $month Month
+ * @param int $year  Year
+ *
+ * @return int
+ * @access private
+ */
+function get_day_end($day = null, $month = null, $year = null) {
+	return mktime(23, 59, 59, $month, $day, $year);
+}
+
+/**
+ * Return the notable entities for a given time period.
+ *
+ * @param int     $start_time     The start time as a unix timestamp.
+ * @param int     $end_time       The end time as a unix timestamp.
+ * @param string  $type           The type of entity (eg "user", "object" etc)
+ * @param string  $subtype        The arbitrary subtype of the entity
+ * @param int     $owner_guid     The GUID of the owning user
+ * @param string  $order_by       The field to order by; by default, time_created desc
+ * @param int     $limit          The number of entities to return; 10 by default
+ * @param int     $offset         The indexing offset, 0 by default
+ * @param boolean $count          Set to true to get a count instead of entities. Defaults to false.
+ * @param int     $site_guid      Site to get entities for. Default 0 = current site. -1 = any.
+ * @param mixed   $container_guid Container or containers to get entities from (default: any).
+ *
+ * @return array|false
+ * @access private
+ */
+function get_notable_entities($start_time, $end_time, $type = "", $subtype = "", $owner_guid = 0,
+$order_by = "asc", $limit = 10, $offset = 0, $count = false, $site_guid = 0,
+$container_guid = null) {
+	global $CONFIG;
+
+	if ($subtype === false || $subtype === null || $subtype === 0) {
+		return false;
+	}
+
+	$start_time = (int)$start_time;
+	$end_time = (int)$end_time;
+	$order_by = sanitise_string($order_by);
+	$limit = (int)$limit;
+	$offset = (int)$offset;
+	$site_guid = (int) $site_guid;
+	if ($site_guid == 0) {
+		$site_guid = $CONFIG->site_guid;
+	}
+
+	$where = array();
+
+	if (is_array($type)) {
+		$tempwhere = "";
+		if (sizeof($type)) {
+			foreach ($type as $typekey => $subtypearray) {
+				foreach ($subtypearray as $subtypeval) {
+					$typekey = sanitise_string($typekey);
+					if (!empty($subtypeval)) {
+						$subtypeval = (int) get_subtype_id($typekey, $subtypeval);
+					} else {
+						$subtypeval = 0;
+					}
+					if (!empty($tempwhere)) {
+						$tempwhere .= " or ";
+					}
+					$tempwhere .= "(e.type = '{$typekey}' and e.subtype = {$subtypeval})";
+				}
+			}
+		}
+		if (!empty($tempwhere)) {
+			$where[] = "({$tempwhere})";
+		}
+	} else {
+		$type = sanitise_string($type);
+		$subtype = get_subtype_id($type, $subtype);
+
+		if ($type != "") {
+			$where[] = "e.type='$type'";
+		}
+
+		if ($subtype !== "") {
+			$where[] = "e.subtype=$subtype";
+		}
+	}
+
+	if ($owner_guid != "") {
+		if (!is_array($owner_guid)) {
+			$owner_array = array($owner_guid);
+			$owner_guid = (int) $owner_guid;
+			$where[] = "e.owner_guid = '$owner_guid'";
+		} else if (sizeof($owner_guid) > 0) {
+			$owner_array = array_map('sanitise_int', $owner_guid);
+			// Cast every element to the owner_guid array to int
+			$owner_guid = implode(",", $owner_guid);
+			$where[] = "e.owner_guid in ({$owner_guid})";
+		}
+		if (is_null($container_guid)) {
+			$container_guid = $owner_array;
+		}
+	}
+
+	if ($site_guid > 0) {
+		$where[] = "e.site_guid = {$site_guid}";
+	}
+
+	if (!is_null($container_guid)) {
+		if (is_array($container_guid)) {
+			foreach ($container_guid as $key => $val) {
+				$container_guid[$key] = (int) $val;
+			}
+			$where[] = "e.container_guid in (" . implode(",", $container_guid) . ")";
+		} else {
+			$container_guid = (int) $container_guid;
+			$where[] = "e.container_guid = {$container_guid}";
+		}
+	}
+
+	// Add the calendar stuff
+	$cal_join = "
+		JOIN {$CONFIG->dbprefix}metadata cal_start on e.guid=cal_start.entity_guid
+		JOIN {$CONFIG->dbprefix}metastrings cal_start_name on cal_start.name_id=cal_start_name.id
+		JOIN {$CONFIG->dbprefix}metastrings cal_start_value on cal_start.value_id=cal_start_value.id
+
+		JOIN {$CONFIG->dbprefix}metadata cal_end on e.guid=cal_end.entity_guid
+		JOIN {$CONFIG->dbprefix}metastrings cal_end_name on cal_end.name_id=cal_end_name.id
+		JOIN {$CONFIG->dbprefix}metastrings cal_end_value on cal_end.value_id=cal_end_value.id
+	";
+	$where[] = "cal_start_name.string='calendar_start'";
+	$where[] = "cal_start_value.string>=$start_time";
+	$where[] = "cal_end_name.string='calendar_end'";
+	$where[] = "cal_end_value.string <= $end_time";
+
+
+	if (!$count) {
+		$query = "SELECT e.* from {$CONFIG->dbprefix}entities e $cal_join where ";
+	} else {
+		$query = "SELECT count(e.guid) as total from {$CONFIG->dbprefix}entities e $cal_join where ";
+	}
+	foreach ($where as $w) {
+		$query .= " $w and ";
+	}
+
+	$query .= get_access_sql_suffix('e'); // Add access controls
+
+	if (!$count) {
+		$query .= " order by n.calendar_start $order_by";
+		// Add order and limit
+		if ($limit) {
+			$query .= " limit $offset, $limit";
+		}
+		$dt = get_data($query, "entity_row_to_elggstar");
+
+		return $dt;
+	} else {
+		$total = get_data_row($query);
+		return $total->total;
+	}
+}
+
+/**
+ * Return the notable entities for a given time period based on an item of metadata.
+ *
+ * @param int    $start_time     The start time as a unix timestamp.
+ * @param int    $end_time       The end time as a unix timestamp.
+ * @param mixed  $meta_name      Metadata name
+ * @param mixed  $meta_value     Metadata value
+ * @param string $entity_type    The type of entity to look for, eg 'site' or 'object'
+ * @param string $entity_subtype The subtype of the entity.
+ * @param int    $owner_guid     Owner GUID
+ * @param int    $limit          Limit
+ * @param int    $offset         Offset
+ * @param string $order_by       Optional ordering.
+ * @param int    $site_guid      Site to get entities for. Default 0 = current site. -1 = any.
+ * @param bool   $count          If true, returns count instead of entities. (Default: false)
+ *
+ * @return int|array A list of entities, or a count if $count is set to true
+ * @access private
+ */
+function get_notable_entities_from_metadata($start_time, $end_time, $meta_name, $meta_value = "",
+$entity_type = "", $entity_subtype = "", $owner_guid = 0, $limit = 10, $offset = 0, $order_by = "",
+$site_guid = 0, $count = false) {
+
+	global $CONFIG;
+
+	$meta_n = get_metastring_id($meta_name);
+	$meta_v = get_metastring_id($meta_value);
+
+	$start_time = (int)$start_time;
+	$end_time = (int)$end_time;
+	$entity_type = sanitise_string($entity_type);
+	$entity_subtype = get_subtype_id($entity_type, $entity_subtype);
+	$limit = (int)$limit;
+	$offset = (int)$offset;
+	if ($order_by == "") {
+		$order_by = "e.time_created desc";
+	}
+	$order_by = sanitise_string($order_by);
+	$site_guid = (int) $site_guid;
+	if ((is_array($owner_guid) && (count($owner_guid)))) {
+		foreach ($owner_guid as $key => $guid) {
+			$owner_guid[$key] = (int) $guid;
+		}
+	} else {
+		$owner_guid = (int) $owner_guid;
+	}
+
+	if ($site_guid == 0) {
+		$site_guid = $CONFIG->site_guid;
+	}
+
+	//$access = get_access_list();
+
+	$where = array();
+
+	if ($entity_type != "") {
+		$where[] = "e.type='$entity_type'";
+	}
+
+	if ($entity_subtype) {
+		$where[] = "e.subtype=$entity_subtype";
+	}
+
+	if ($meta_name != "") {
+		$where[] = "m.name_id='$meta_n'";
+	}
+
+	if ($meta_value != "") {
+		$where[] = "m.value_id='$meta_v'";
+	}
+
+	if ($site_guid > 0) {
+		$where[] = "e.site_guid = {$site_guid}";
+	}
+
+	if (is_array($owner_guid)) {
+		$where[] = "e.container_guid in (" . implode(",", $owner_guid) . ")";
+	} else if ($owner_guid > 0) {
+		$where[] = "e.container_guid = {$owner_guid}";
+	}
+
+	// Add the calendar stuff
+	$cal_join = "
+		JOIN {$CONFIG->dbprefix}metadata cal_start on e.guid=cal_start.entity_guid
+		JOIN {$CONFIG->dbprefix}metastrings cal_start_name on cal_start.name_id=cal_start_name.id
+		JOIN {$CONFIG->dbprefix}metastrings cal_start_value on cal_start.value_id=cal_start_value.id
+
+		JOIN {$CONFIG->dbprefix}metadata cal_end on e.guid=cal_end.entity_guid
+		JOIN {$CONFIG->dbprefix}metastrings cal_end_name on cal_end.name_id=cal_end_name.id
+		JOIN {$CONFIG->dbprefix}metastrings cal_end_value on cal_end.value_id=cal_end_value.id
+	";
+
+	$where[] = "cal_start_name.string='calendar_start'";
+	$where[] = "cal_start_value.string>=$start_time";
+	$where[] = "cal_end_name.string='calendar_end'";
+	$where[] = "cal_end_value.string <= $end_time";
+
+	if (!$count) {
+		$query = "SELECT distinct e.* ";
+	} else {
+		$query = "SELECT count(distinct e.guid) as total ";
+	}
+
+	$query .= "from {$CONFIG->dbprefix}entities e"
+	. " JOIN {$CONFIG->dbprefix}metadata m on e.guid = m.entity_guid $cal_join where";
+
+	foreach ($where as $w) {
+		$query .= " $w and ";
+	}
+
+	// Add access controls
+	$query .= get_access_sql_suffix("e");
+	$query .= ' and ' . get_access_sql_suffix("m");
+
+	if (!$count) {
+		// Add order and limit
+		$query .= " order by $order_by limit $offset, $limit";
+		return get_data($query, "entity_row_to_elggstar");
+	} else {
+		if ($row = get_data_row($query)) {
+			return $row->total;
+		}
+	}
+
+	return false;
+}
+
+/**
+ * Return the notable entities for a given time period based on their relationship.
+ *
+ * @param int     $start_time           The start time as a unix timestamp.
+ * @param int     $end_time             The end time as a unix timestamp.
+ * @param string  $relationship         The relationship eg "friends_of"
+ * @param int     $relationship_guid    The guid of the entity to use query
+ * @param bool    $inverse_relationship Reverse the normal function of the query to say
+ *                                      "give me all entities for whom $relationship_guid is a
+ *                                      $relationship of"
+ * @param string  $type                 Entity type
+ * @param string  $subtype              Entity subtype
+ * @param int     $owner_guid           Owner GUID
+ * @param string  $order_by             Optional Order by
+ * @param int     $limit                Limit
+ * @param int     $offset               Offset
+ * @param boolean $count                If true returns a count of entities (default false)
+ * @param int     $site_guid            Site to get entities for. Default 0 = current site. -1 = any
+ *
+ * @return array|int|false An array of entities, or the number of entities, or false on failure
+ * @access private
+ */
+function get_noteable_entities_from_relationship($start_time, $end_time, $relationship,
+$relationship_guid, $inverse_relationship = false, $type = "", $subtype = "", $owner_guid = 0,
+$order_by = "", $limit = 10, $offset = 0, $count = false, $site_guid = 0) {
+
+	global $CONFIG;
+
+	$start_time = (int)$start_time;
+	$end_time = (int)$end_time;
+	$relationship = sanitise_string($relationship);
+	$relationship_guid = (int)$relationship_guid;
+	$inverse_relationship = (bool)$inverse_relationship;
+	$type = sanitise_string($type);
+	$subtype = get_subtype_id($type, $subtype);
+	$owner_guid = (int)$owner_guid;
+	if ($order_by == "") {
+		$order_by = "time_created desc";
+	}
+	$order_by = sanitise_string($order_by);
+	$limit = (int)$limit;
+	$offset = (int)$offset;
+	$site_guid = (int) $site_guid;
+	if ($site_guid == 0) {
+		$site_guid = $CONFIG->site_guid;
+	}
+
+	//$access = get_access_list();
+
+	$where = array();
+
+	if ($relationship != "") {
+		$where[] = "r.relationship='$relationship'";
+	}
+	if ($relationship_guid) {
+		$where[] = $inverse_relationship ?
+			"r.guid_two='$relationship_guid'" : "r.guid_one='$relationship_guid'";
+	}
+	if ($type != "") {
+		$where[] = "e.type='$type'";
+	}
+	if ($subtype) {
+		$where[] = "e.subtype=$subtype";
+	}
+	if ($owner_guid != "") {
+		$where[] = "e.container_guid='$owner_guid'";
+	}
+	if ($site_guid > 0) {
+		$where[] = "e.site_guid = {$site_guid}";
+	}
+
+	// Add the calendar stuff
+	$cal_join = "
+		JOIN {$CONFIG->dbprefix}metadata cal_start on e.guid=cal_start.entity_guid
+		JOIN {$CONFIG->dbprefix}metastrings cal_start_name on cal_start.name_id=cal_start_name.id
+		JOIN {$CONFIG->dbprefix}metastrings cal_start_value on cal_start.value_id=cal_start_value.id
+
+		JOIN {$CONFIG->dbprefix}metadata cal_end on e.guid=cal_end.entity_guid
+		JOIN {$CONFIG->dbprefix}metastrings cal_end_name on cal_end.name_id=cal_end_name.id
+		JOIN {$CONFIG->dbprefix}metastrings cal_end_value on cal_end.value_id=cal_end_value.id
+	";
+	$where[] = "cal_start_name.string='calendar_start'";
+	$where[] = "cal_start_value.string>=$start_time";
+	$where[] = "cal_end_name.string='calendar_end'";
+	$where[] = "cal_end_value.string <= $end_time";
+
+	// Select what we're joining based on the options
+	$joinon = "e.guid = r.guid_one";
+	if (!$inverse_relationship) {
+		$joinon = "e.guid = r.guid_two";
+	}
+
+	if ($count) {
+		$query = "SELECT count(distinct e.guid) as total ";
+	} else {
+		$query = "SELECT distinct e.* ";
+	}
+	$query .= " from {$CONFIG->dbprefix}entity_relationships r"
+	. " JOIN {$CONFIG->dbprefix}entities e on $joinon $cal_join where ";
+
+	foreach ($where as $w) {
+		$query .= " $w and ";
+	}
+	// Add access controls
+	$query .= get_access_sql_suffix("e");
+	if (!$count) {
+		$query .= " order by $order_by limit $offset, $limit"; // Add order and limit
+		return get_data($query, "entity_row_to_elggstar");
+	} else {
+		if ($count = get_data_row($query)) {
+			return $count->total;
+		}
+	}
+	return false;
+}
+
+/**
+ * Get all entities for today.
+ *
+ * @param string  $type           The type of entity (eg "user", "object" etc)
+ * @param string  $subtype        The arbitrary subtype of the entity
+ * @param int     $owner_guid     The GUID of the owning user
+ * @param string  $order_by       The field to order by; by default, time_created desc
+ * @param int     $limit          The number of entities to return; 10 by default
+ * @param int     $offset         The indexing offset, 0 by default
+ * @param boolean $count          If true returns a count of entities (default false)
+ * @param int     $site_guid      Site to get entities for. Default 0 = current site. -1 = any
+ * @param mixed   $container_guid Container(s) to get entities from (default: any).
+ *
+ * @return array|false
+ * @access private
+ */
+function get_todays_entities($type = "", $subtype = "", $owner_guid = 0, $order_by = "",
+$limit = 10, $offset = 0, $count = false, $site_guid = 0, $container_guid = null) {
+
+	$day_start = get_day_start();
+	$day_end = get_day_end();
+
+	return get_notable_entities($day_start, $day_end, $type, $subtype, $owner_guid, $order_by,
+		$limit, $offset, $count, $site_guid, $container_guid);
+}
+
+/**
+ * Get entities for today from metadata.
+ *
+ * @param mixed  $meta_name      Metadata name
+ * @param mixed  $meta_value     Metadata value
+ * @param string $entity_type    The type of entity to look for, eg 'site' or 'object'
+ * @param string $entity_subtype The subtype of the entity.
+ * @param int    $owner_guid     Owner GUID
+ * @param int    $limit          Limit
+ * @param int    $offset         Offset
+ * @param string $order_by       Optional ordering.
+ * @param int    $site_guid      Site to get entities for. Default 0 = current site. -1 = any.
+ * @param bool   $count          If true, returns count instead of entities. (Default: false)
+ *
+ * @return int|array A list of entities, or a count if $count is set to true
+ * @access private
+ */
+function get_todays_entities_from_metadata($meta_name, $meta_value = "", $entity_type = "",
+$entity_subtype = "", $owner_guid = 0, $limit = 10, $offset = 0, $order_by = "", $site_guid = 0,
+$count = false) {
+
+	$day_start = get_day_start();
+	$day_end = get_day_end();
+
+	return get_notable_entities_from_metadata($day_start, $day_end, $meta_name, $meta_value,
+		$entity_type, $entity_subtype, $owner_guid, $limit, $offset, $order_by, $site_guid, $count);
+}
+
+/**
+ * Get entities for today from a relationship
+ *
+ * @param string  $relationship         The relationship eg "friends_of"
+ * @param int     $relationship_guid    The guid of the entity to use query
+ * @param bool    $inverse_relationship Reverse the normal function of the query to say
+ *                                      "give me all entities for whom $relationship_guid is a
+ *                                      $relationship of"
+ * @param string  $type                 Entity type
+ * @param string  $subtype              Entity subtype
+ * @param int     $owner_guid           Owner GUID
+ * @param string  $order_by             Optional Order by
+ * @param int     $limit                Limit
+ * @param int     $offset               Offset
+ * @param boolean $count                If true returns a count of entities (default false)
+ * @param int     $site_guid            Site to get entities for. Default 0 = current site. -1 = any
+ *
+ * @return array|int|false An array of entities, or the number of entities, or false on failure
+ * @access private
+ */
+function get_todays_entities_from_relationship($relationship, $relationship_guid,
+$inverse_relationship = false, $type = "", $subtype = "", $owner_guid = 0,
+$order_by = "", $limit = 10, $offset = 0, $count = false, $site_guid = 0) {
+
+	$day_start = get_day_start();
+	$day_end = get_day_end();
+
+	return get_notable_entities_from_relationship($day_start, $day_end, $relationship,
+		$relationship_guid,	$inverse_relationship, $type, $subtype, $owner_guid, $order_by,
+		$limit, $offset, $count, $site_guid);
+}
+
+/**
+ * Returns a viewable list of entities for a given time period.
+ *
+ * @see elgg_view_entity_list
+ *
+ * @param int     $start_time     The start time as a unix timestamp.
+ * @param int     $end_time       The end time as a unix timestamp.
+ * @param string  $type           The type of entity (eg "user", "object" etc)
+ * @param string  $subtype        The arbitrary subtype of the entity
+ * @param int     $owner_guid     The GUID of the owning user
+ * @param int     $limit          The number of entities to return; 10 by default
+ * @param boolean $fullview       Whether or not to display the full view (default: true)
+ * @param boolean $listtypetoggle Whether or not to allow gallery view
+ * @param boolean $navigation     Display pagination? Default: true
+ *
+ * @return string A viewable list of entities
+ * @access private
+ */
+function list_notable_entities($start_time, $end_time, $type= "", $subtype = "", $owner_guid = 0,
+$limit = 10, $fullview = true, $listtypetoggle = false, $navigation = true) {
+
+	$offset = (int) get_input('offset');
+	$count = get_notable_entities($start_time, $end_time, $type, $subtype,
+		$owner_guid, "", $limit, $offset, true);
+
+	$entities = get_notable_entities($start_time, $end_time, $type, $subtype,
+		$owner_guid, "", $limit, $offset);
+
+	return elgg_view_entity_list($entities, $count, $offset, $limit,
+		$fullview, $listtypetoggle, $navigation);
+}
+
+/**
+ * Return a list of today's entities.
+ *
+ * @see list_notable_entities
+ *
+ * @param string  $type           The type of entity (eg "user", "object" etc)
+ * @param string  $subtype        The arbitrary subtype of the entity
+ * @param int     $owner_guid     The GUID of the owning user
+ * @param int     $limit          The number of entities to return; 10 by default
+ * @param boolean $fullview       Whether or not to display the full view (default: true)
+ * @param boolean $listtypetoggle Whether or not to allow gallery view
+ * @param boolean $navigation     Display pagination? Default: true
+ *
+ * @return string A viewable list of entities
+ * @access private
+ */
+function list_todays_entities($type= "", $subtype = "", $owner_guid = 0, $limit = 10,
+$fullview = true, $listtypetoggle = false, $navigation = true) {
+
+	$day_start = get_day_start();
+	$day_end = get_day_end();
+
+	return list_notable_entities($day_start, $day_end, $type, $subtype, $owner_guid, $limit,
+		$fullview, $listtypetoggle, $navigation);
+}
diff --git a/engine/lib/configuration.php b/engine/lib/configuration.php
index 3fade8155..9bf1529d6 100644
--- a/engine/lib/configuration.php
+++ b/engine/lib/configuration.php
@@ -3,8 +3,9 @@
  * Elgg configuration procedural code.
  *
  * Includes functions for manipulating the configuration values stored in the database
- * Plugin authors should use the {@link get_config()}, {@link set_config()},
- * and {@unset_config()} functions to access or update config values.
+ * Plugin authors should use the {@link elgg_get_config()}, {@link elgg_set_config()},
+ * {@link elgg_save_config()}, and {@unset_config()} functions to access or update
+ * config values.
  *
  * Elgg's configuration is split among 2 tables and 1 file:
  * - dbprefix_config
@@ -302,7 +303,7 @@ function datalist_set($name, $value) {
 		. " set name = '{$sanitised_name}', value = '{$sanitised_value}'"
 		. " ON DUPLICATE KEY UPDATE value='{$sanitised_value}'");
 
-	if ($success) {
+	if ($success !== FALSE) {
 		$DATALIST_CACHE[$name] = $value;
 		return true;
 	} else {
@@ -517,10 +518,10 @@ function get_all_config($site_guid = 0) {
 	$site_guid = (int) $site_guid;
 
 	if ($site_guid == 0) {
-		$site_guid = (int) $CONFIG->site_id;
+		$site_guid = (int) $CONFIG->site_guid;
 	}
 
-	if ($result = get_data("SELECT * from {$CONFIG->dbprefix}config where site_guid = {$site_guid}")) {
+	if ($result = get_data("SELECT * FROM {$CONFIG->dbprefix}config WHERE site_guid = $site_guid")) {
 		foreach ($result as $r) {
 			$name = $r->name;
 			$value = $r->value;
@@ -533,37 +534,49 @@ function get_all_config($site_guid = 0) {
 }
 
 /**
- * Sets defaults for or attempts to autodetect some common config values and
- * loads them into $CONFIG.
+ * Loads configuration related to this site
  *
- * @return true
+ * This loads from the config database table and the site entity
  * @access private
  */
-function set_default_config() {
+function _elgg_load_site_config() {
 	global $CONFIG;
 
-	$install_root = str_replace("\\", "/", dirname(dirname(dirname(__FILE__))));
-
-	// @todo this seldom works right.
-	$pathpart = str_replace("//", "/", str_replace($_SERVER['DOCUMENT_ROOT'], "", $install_root));
-	if (substr($pathpart, 0, 1) != "/") {
-		$pathpart = "/" . $pathpart;
+	$CONFIG->site_guid = (int) datalist_get('default_site');
+	$CONFIG->site_id = $CONFIG->site_guid;
+	$CONFIG->site = get_entity($CONFIG->site_guid);
+	if (!$CONFIG->site) {
+		throw new InstallationException(elgg_echo('InstallationException:SiteNotInstalled'));
 	}
-	$www_root = "http://" . $_SERVER['HTTP_HOST'] . $pathpart;
 
+	$CONFIG->wwwroot = $CONFIG->site->url;
+	$CONFIG->sitename = $CONFIG->site->name;
+	$CONFIG->sitedescription = $CONFIG->site->description;
+	$CONFIG->siteemail = $CONFIG->site->email;
+	$CONFIG->url = $CONFIG->wwwroot;
+
+	get_all_config();
+}
+
+/**
+ * Loads configuration related to Elgg as an application
+ *
+ * This loads from the datalists database table
+ * @access private
+ */
+function _elgg_load_application_config() {
+	global $CONFIG;
+
+	$install_root = str_replace("\\", "/", dirname(dirname(dirname(__FILE__))));
 	$defaults = array(
 		'path'			=>	"$install_root/",
 		'view_path'		=>	"$install_root/views/",
 		'plugins_path'	=>	"$install_root/mod/",
-		'wwwroot'		=>	$www_root,
-		'url'			=>	$www_root,
-		'site_name'		=>	'New Elgg site',
 		'language'		=>	'en',
 
-		// compatibility with old names for ppl not using get_config()
+		// compatibility with old names for plugins not using elgg_get_config()
 		'viewpath'		=>	"$install_root/views/",
 		'pluginspath'	=>	"$install_root/mod/",
-		'sitename'		=>	'New Elgg site',
 	);
 
 	foreach ($defaults as $name => $value) {
@@ -572,25 +585,6 @@ function set_default_config() {
 		}
 	}
 
-	$CONFIG->context = array();
-
-	return true;
-}
-
-/**
- * Loads values into $CONFIG.
- *
- * If Elgg is installed, this function pulls all rows from dbprefix_config
- * and cherry picks some values from dbprefix_datalists.  This also extracts
- * some commonly used values from the default site object.
- *
- * @elgg_event boot system
- * @return true|null
- * @access private
- */
-function configuration_boot() {
-	global $CONFIG;
-
 	$path = datalist_get('path');
 	if (!empty($path)) {
 		$CONFIG->path = $path;
@@ -605,22 +599,23 @@ function configuration_boot() {
 	} else {
 		$CONFIG->simplecache_enabled = 1;
 	}
-	$viewpath_cache_enabled = datalist_get('viewpath_cache_enabled');
-	if ($viewpath_cache_enabled !== false) {
-		$CONFIG->viewpath_cache_enabled = $viewpath_cache_enabled;
+	$system_cache_enabled = datalist_get('system_cache_enabled');
+	if ($system_cache_enabled !== false) {
+		$CONFIG->system_cache_enabled = $system_cache_enabled;
 	} else {
-		$CONFIG->viewpath_cache_enabled = 1;
+		$CONFIG->system_cache_enabled = 1;
 	}
-	if (isset($CONFIG->site) && ($CONFIG->site instanceof ElggSite)) {
-		$CONFIG->wwwroot = $CONFIG->site->url;
-		$CONFIG->sitename = $CONFIG->site->name;
-		$CONFIG->sitedescription = $CONFIG->site->description;
-		$CONFIG->siteemail = $CONFIG->site->email;
-	}
-	$CONFIG->url = $CONFIG->wwwroot;
 
-	// Load default settings from database
-	get_all_config();
-}
+	// initialize context here so it is set before the get_input call
+	$CONFIG->context = array();
+
+	// needs to be set before system, init for links in html head
+	$viewtype = get_input('view', 'default');
+	$lastcached = datalist_get("simplecache_lastcached_$viewtype");
+	$CONFIG->lastcache = $lastcached;
 
-elgg_register_event_handler('boot', 'system', 'configuration_boot', 10);
+	$CONFIG->i18n_loaded_from_cache = false;
+
+	// this must be synced with the enum for the entities table
+	$CONFIG->entity_types = array('group', 'object', 'site', 'user');
+}
diff --git a/engine/lib/database.php b/engine/lib/database.php
index 444bb7cc4..cc2b99f6a 100644
--- a/engine/lib/database.php
+++ b/engine/lib/database.php
@@ -189,22 +189,6 @@ function db_delayedexecution_shutdown_hook() {
 }
 
 /**
- * Registers shutdown functions for database profiling and delayed queries.
- *
- * @note Database connections are established upon first call to database.
- *
- * @return true
- * @elgg_event_handler boot system
- * @access private
- */
-function init_db() {
-	register_shutdown_function('db_delayedexecution_shutdown_hook');
-	register_shutdown_function('db_profiling_shutdown_hook');
-
-	return true;
-}
-
-/**
  * Returns (if required, also creates) a database link resource.
  *
  * Database link resources are stored in the {@link $dblink} global.  These
@@ -757,6 +741,13 @@ function sanitize_int($int, $signed = true) {
 }
 
 /**
- * @elgg_register_event boot system init_db
+ * Registers shutdown functions for database profiling and delayed queries.
+ *
+ * @access private
  */
-elgg_register_event_handler('boot', 'system', 'init_db', 0);
+function init_db() {
+	register_shutdown_function('db_delayedexecution_shutdown_hook');
+	register_shutdown_function('db_profiling_shutdown_hook');
+}
+
+elgg_register_event_handler('init', 'system', 'init_db');
diff --git a/engine/lib/deprecated-1.8.php b/engine/lib/deprecated-1.8.php
index e1866498b..4b9d41543 100644
--- a/engine/lib/deprecated-1.8.php
+++ b/engine/lib/deprecated-1.8.php
@@ -1674,7 +1674,7 @@ function get_plugin_list() {
  * otherwise you may experience view display artifacts. Do this with the following code:
  *
  * 		elgg_regenerate_simplecache();
- *		elgg_filepath_cache_reset();
+ *		elgg_reset_system_cache();
  *
  * @deprecated 1.8 Use elgg_generate_plugin_entities() and elgg_set_plugin_priorities()
  *
@@ -1841,7 +1841,7 @@ function get_installed_plugins($status = 'all') {
  * otherwise you may experience view display artifacts. Do this with the following code:
  *
  * 		elgg_regenerate_simplecache();
- *		elgg_filepath_cache_reset();
+ *		elgg_reset_system_cache();
  *
  * @deprecated 1.8 Use ElggPlugin->activate()
  *
@@ -1882,7 +1882,7 @@ function enable_plugin($plugin, $site_guid = null) {
  * otherwise you may experience view display artifacts. Do this with the following code:
  *
  * 		elgg_regenerate_simplecache();
- *		elgg_filepath_cache_reset();
+ *		elgg_reset_system_cache();
  *
  * @deprecated 1.8 Use ElggPlugin->deactivate()
  *
diff --git a/engine/lib/elgglib.php b/engine/lib/elgglib.php
index 9035d95f2..b55958a6c 100644
--- a/engine/lib/elgglib.php
+++ b/engine/lib/elgglib.php
@@ -995,7 +995,8 @@ function elgg_trigger_plugin_hook($hook, $type, $params = null, $returnvalue = n
  * @access private
  */
 function _elgg_php_exception_handler($exception) {
-	error_log("*** FATAL EXCEPTION *** : " . $exception);
+	$timestamp = time();
+	error_log("Exception #$timestamp: $exception");
 
 	// Wipe any existing output buffer
 	ob_end_clean();
@@ -1011,7 +1012,17 @@ function _elgg_php_exception_handler($exception) {
 		$CONFIG->pagesetupdone = true;
 
 		elgg_set_viewtype('failsafe');
-		$body = elgg_view("messages/exceptions/exception", array('object' => $exception));
+		if (elgg_is_admin_logged_in()) {
+			$body = elgg_view("messages/exceptions/admin_exception", array(
+				'object' => $exception,
+				'ts' => $timestamp
+			));
+		} else {
+			$body = elgg_view("messages/exceptions/exception", array(
+				'object' => $exception,
+				'ts' => $timestamp
+			));
+		}
 		echo elgg_view_page(elgg_echo('exception:title'), $body);
 	} catch (Exception $e) {
 		$timestamp = time();
@@ -1959,7 +1970,7 @@ function elgg_is_valid_options_for_batch_operation($options, $type) {
 	// at least one of these is required.
 	$required = array(
 		// generic restraints
-		'guid', 'guids', 'limit'
+		'guid', 'guids'
 	);
 
 	switch ($type) {
@@ -2010,8 +2021,14 @@ function elgg_walled_garden_index() {
 	elgg_load_css('elgg.walled_garden');
 	elgg_load_js('elgg.walled_garden');
 	
-	$body = elgg_view('core/walled_garden/body');
+	$content = elgg_view('core/walled_garden/login');
 
+	$params = array(
+		'content' => $content,
+		'class' => 'elgg-walledgarden-double',
+		'id' => 'elgg-walledgarden-login',
+	);
+	$body = elgg_view_layout('walled_garden', $params);
 	echo elgg_view_page('', $body, 'walled_garden');
 
 	// return true to prevent other plugins from adding a front page
@@ -2019,6 +2036,24 @@ function elgg_walled_garden_index() {
 }
 
 /**
+ * Serve walled garden sections
+ *
+ * @param array $page Array of URL segments
+ * @return string
+ * @access private
+ */
+function _elgg_walled_garden_ajax_handler($page) {
+	$view = $page[0];
+	$params = array(
+		'content' => elgg_view("core/walled_garden/$view"),
+		'class' => 'elgg-walledgarden-single hidden',
+		'id' => str_replace('_', '-', "elgg-walledgarden-$view"),
+	);
+	echo elgg_view_layout('walled_garden', $params);
+	return true;
+}
+
+/**
  * Checks the status of the Walled Garden and forwards to a login page
  * if required.
  *
@@ -2038,6 +2073,8 @@ function elgg_walled_garden() {
 	elgg_register_css('elgg.walled_garden', '/css/walled_garden.css');
 	elgg_register_js('elgg.walled_garden', '/js/walled_garden.js');
 
+	elgg_register_page_handler('walled_garden', '_elgg_walled_garden_ajax_handler');
+
 	// check for external page view
 	if (isset($CONFIG->site) && $CONFIG->site instanceof ElggSite) {
 		$CONFIG->site->checkWalledGarden();
@@ -2045,6 +2082,36 @@ function elgg_walled_garden() {
 }
 
 /**
+ * Boots the engine
+ *
+ * 1. sets error handlers
+ * 2. connects to database
+ * 3. verifies the installation suceeded
+ * 4. loads application configuration
+ * 5. loads i18n data
+ * 6. loads site configuration
+ *
+ * @access private
+ */
+function _elgg_engine_boot() {
+	// Register the error handlers
+	set_error_handler('_elgg_php_error_handler');
+	set_exception_handler('_elgg_php_exception_handler');
+
+	setup_db_connections();
+
+	verify_installation();
+
+	_elgg_load_application_config();
+
+	register_translations(dirname(dirname(dirname(__FILE__))) . "/languages/");
+
+	_elgg_load_site_config();
+
+	_elgg_load_cache();
+}
+
+/**
  * Elgg's main init.
  *
  * Handles core actions for comments, the JS pagehandler, and the shutdown function.
@@ -2167,6 +2234,7 @@ define('REFERRER', -1);
 define('REFERER', -1);
 
 elgg_register_event_handler('init', 'system', 'elgg_init');
+elgg_register_event_handler('boot', 'system', '_elgg_engine_boot', 1);
 elgg_register_plugin_hook_handler('unit_test', 'system', 'elgg_api_test');
 
 elgg_register_event_handler('init', 'system', 'add_custom_menu_items', 1000);
diff --git a/engine/lib/entities.php b/engine/lib/entities.php
index 82452fba1..4875b2c2f 100644
--- a/engine/lib/entities.php
+++ b/engine/lib/entities.php
@@ -738,6 +738,7 @@ function elgg_entity_exists($guid) {
  *           Joined with subtypes by AND. See below)
  *
  * 	subtypes => NULL|STR entity subtype (SQL: subtype IN ('subtype1', 'subtype2))
+ *              Use ELGG_ENTITIES_NO_VALUE for no subtype.
  *
  * 	type_subtype_pairs => NULL|ARR (array('type' => 'subtype'))
  *                        (type = '$type' AND subtype = '$subtype') pairs
@@ -960,8 +961,8 @@ function elgg_get_entity_type_subtype_where_sql($table, $types, $subtypes, $pair
 		return '';
 	}
 
-	// these are the only valid types for entities in elgg as defined in the DB.
-	$valid_types = array('object', 'user', 'group', 'site');
+	// these are the only valid types for entities in elgg
+	$valid_types = elgg_get_config('entity_types');
 
 	// pairs override
 	$wheres = array();
@@ -1378,6 +1379,10 @@ function disable_entity($guid, $reason = "", $recursive = true) {
 				}
 
 				if ($recursive) {
+					$hidden = access_get_show_hidden_status();
+					access_show_hidden_entities(true);
+					$ia = elgg_set_ignore_access(true);
+					
 					$sub_entities = get_data("SELECT * FROM {$CONFIG->dbprefix}entities
 						WHERE (
 						container_guid = $guid
@@ -1391,6 +1396,8 @@ function disable_entity($guid, $reason = "", $recursive = true) {
 							$e->disable($reason);
 						}
 					}
+					access_show_hidden_entities($hidden);
+					elgg_set_ignore_access($ia);
 				}
 
 				$entity->disableMetadata();
@@ -1514,18 +1521,23 @@ function delete_entity($guid, $recursive = true) {
 					$entity_disable_override = access_get_show_hidden_status();
 					access_show_hidden_entities(true);
 					$ia = elgg_set_ignore_access(true);
-					$sub_entities = get_data("SELECT * from {$CONFIG->dbprefix}entities
-						WHERE container_guid=$guid
-							or owner_guid=$guid
-							or site_guid=$guid", 'entity_row_to_elggstar');
-					if ($sub_entities) {
-						foreach ($sub_entities as $e) {
-							// check for equality so that an entity that is its own
-							// owner or container does not cause infinite loop
-							if ($e->guid != $guid) {
-								$e->delete(true);
-							}
-						}
+
+					// @todo there was logic in the original code that ignored
+					// entities with owner or container guids of themselves.
+					// this should probably be prevented in ElggEntity instead of checked for here
+					$options = array(
+						'wheres' => array(
+							"((container_guid = $guid OR owner_guid = $guid OR site_guid = $guid)"
+							. " AND guid != $guid)"
+							),
+						'limit' => 0
+					);
+
+					$batch = new ElggBatch('elgg_get_entities', $options);
+					$batch->setIncrementOffset(false);
+
+					foreach ($batch as $e) {
+						$e->delete(true);
 					}
 
 					access_show_hidden_entities($entity_disable_override);
@@ -1959,7 +1971,7 @@ function elgg_register_entity_type($type, $subtype = null) {
 	global $CONFIG;
 
 	$type = strtolower($type);
-	if (!in_array($type, array('object', 'site', 'group', 'user'))) {
+	if (!in_array($type, $CONFIG->entity_types)) {
 		return FALSE;
 	}
 
@@ -1994,7 +2006,7 @@ function unregister_entity_type($type, $subtype) {
 	global $CONFIG;
 
 	$type = strtolower($type);
-	if (!in_array($type, array('object', 'site', 'group', 'user'))) {
+	if (!in_array($type, $CONFIG->entity_types)) {
 		return FALSE;
 	}
 
@@ -2162,31 +2174,8 @@ function elgg_list_registered_entities(array $options = array()) {
 		$entities = array();
 	}
 
-	return elgg_view_entity_list($entities, $count, $options['offset'],
-		$options['limit'], $options['full_view'], $options['list_type_toggle'], $options['pagination']);
-}
-
-/**
- * Check the recursive delete permissions token.
- *
- * If an entity is deleted recursively, a permissions override is required to allow
- * contained or owned entities to be removed.
- *
- * @return bool
- * @elgg_plugin_hook_handler permissions_check all
- * @elgg_plugin_hook_handler permissions_check:metadata all
- * @access private
- */
-function recursive_delete_permissions_check() {
-	static $__RECURSIVE_DELETE_TOKEN;
-
-	if ((elgg_is_logged_in()) && ($__RECURSIVE_DELETE_TOKEN)
-	&& (strcmp($__RECURSIVE_DELETE_TOKEN, md5(elgg_get_logged_in_user_guid())))) {
-		return true;
-	}
-
-	// consult next function
-	return NULL;
+	$options['count'] = $count;
+	return elgg_view_entity_list($entities, $options);
 }
 
 /**
@@ -2303,11 +2292,6 @@ function entities_init() {
 
 	elgg_register_plugin_hook_handler('unit_test', 'system', 'entities_test');
 
-	// Allow a permission override for recursive entity deletion
-	// @todo Can this be done better?
-	elgg_register_plugin_hook_handler('permissions_check', 'all', 'recursive_delete_permissions_check');
-	elgg_register_plugin_hook_handler('permissions_check:metadata', 'all', 'recursive_delete_permissions_check');
-
 	elgg_register_plugin_hook_handler('gc', 'system', 'entities_gc');
 }
 
diff --git a/engine/lib/group.php b/engine/lib/group.php
index 29330eeca..feb1f1e7f 100644
--- a/engine/lib/group.php
+++ b/engine/lib/group.php
@@ -261,16 +261,24 @@ function group_gatekeeper($forward = true) {
 	if ($group = elgg_get_page_owner_entity()) {
 		if ($group instanceof ElggGroup) {
 			$url = $group->getURL();
-			if (
-				((!elgg_is_logged_in()) && (!$group->isPublicMembership())) ||
-				((!$group->isMember(elgg_get_logged_in_user_entity()) && (!$group->isPublicMembership())))
-			) {
-				$allowed = false;
-			}
+			if (!$group->isPublicMembership()) {
+				// closed group so must be member or an admin
+
+				if (!elgg_is_logged_in()) {
+					$allowed = false;
+					if ($forward == true) {
+						$_SESSION['last_forward_from'] = current_page_url();
+						register_error(elgg_echo('loggedinrequired'));
+						forward('', 'login');
+					}
+				} else if (!$group->isMember(elgg_get_logged_in_user_entity())) {
+					$allowed = false;
+				}
 
-			// Admin override
-			if (elgg_is_admin_logged_in()) {
-				$allowed = true;
+				// Admin override
+				if (elgg_is_admin_logged_in()) {
+					$allowed = true;
+				}
 			}
 		}
 	}
diff --git a/engine/lib/languages.php b/engine/lib/languages.php
index 0400843af..bf6829a39 100644
--- a/engine/lib/languages.php
+++ b/engine/lib/languages.php
@@ -145,9 +145,16 @@ function elgg_echo($message_key, $args = array(), $language = "") {
 function register_translations($path, $load_all = false) {
 	global $CONFIG;
 
+	static $load_from_cache;
+	static $cache_loaded_langs;
+	if (!isset($load_from_cache)) {
+		$load_from_cache = $CONFIG->system_cache_enabled;
+		$cache_loaded_langs = array();
+	}
+
 	$path = sanitise_filepath($path);
 
-	// Make a note of this path just incase we need to register this language later
+	// Make a note of this path just in case we need to register this language later
 	if (!isset($CONFIG->language_paths)) {
 		$CONFIG->language_paths = array();
 	}
@@ -155,7 +162,6 @@ function register_translations($path, $load_all = false) {
 
 	// Get the current language based on site defaults and user preference
 	$current_language = get_current_language();
-	elgg_log("Translations loaded from: $path");
 
 	// only load these files unless $load_all is true.
 	$load_language_files = array(
@@ -165,6 +171,32 @@ function register_translations($path, $load_all = false) {
 
 	$load_language_files = array_unique($load_language_files);
 
+	if ($load_from_cache && !$load_all) {
+		// load language files from cache
+		$data = array();
+		foreach ($load_language_files as $lang_file) {
+			$lang = substr($lang_file, 0, strpos($lang_file, '.'));
+			if (!isset($cache_loaded_langs[$lang])) {
+				$data[$lang] = elgg_load_system_cache($lang_file);
+				if ($data[$lang]) {
+					$cache_loaded_langs[$lang] = true;
+				} else {
+					// this language file not cached yet
+					$load_from_cache = false;
+				}
+			}
+		}
+
+		// are we still suppose to load from cache
+		if ($load_from_cache) {
+			foreach ($data as $lang => $map) {
+				add_translation($lang, unserialize($map));
+			}
+			$CONFIG->i18n_loaded_from_cache = true;
+			return true;
+		}
+	}
+
 	$handle = opendir($path);
 	if (!$handle) {
 		elgg_log("Could not open language path: $path", 'ERROR');
@@ -186,6 +218,11 @@ function register_translations($path, $load_all = false) {
 		}
 	}
 
+	elgg_log("Translations loaded from: $path");
+
+	// make sure caching code saves language data if system cache is on
+	$CONFIG->i18n_loaded_from_cache = false;
+
 	return $return;
 }
 
@@ -311,5 +348,3 @@ function elgg_languages_init() {
 }
 
 elgg_register_event_handler('init', 'system', 'elgg_languages_init');
-
-register_translations(dirname(dirname(dirname(__FILE__))) . "/languages/");
diff --git a/engine/lib/metadata.php b/engine/lib/metadata.php
index 19e8aa3c8..34a36d86e 100644
--- a/engine/lib/metadata.php
+++ b/engine/lib/metadata.php
@@ -294,11 +294,11 @@ function elgg_get_metadata(array $options = array()) {
  * Deletes metadata based on $options.
  *
  * @warning Unlike elgg_get_metadata() this will not accept an empty options array!
- *          This requires some constraints: metadata_owner_guid(s),
- *          metadata_name(s), metadata_value(s), or limit must be set.
+ *          This requires at least one constraint: metadata_owner_guid(s),
+ *          metadata_name(s), metadata_value(s), or guid(s) must be set.
  *
- * @param array $options An options array. {@See elgg_get_metadata()}
- * @return mixed
+ * @param array $options An options array. {@see elgg_get_metadata()}
+ * @return mixed Null if the metadata name is invalid. Bool on success or fail.
  * @since 1.8.0
  */
 function elgg_delete_metadata(array $options) {
@@ -307,7 +307,8 @@ function elgg_delete_metadata(array $options) {
 	}
 
 	$options['metastring_type'] = 'metadata';
-	return elgg_batch_metastring_based_objects($options, 'elgg_batch_delete_callback');
+	$result = elgg_batch_metastring_based_objects($options, 'elgg_batch_delete_callback');
+	return $result;
 }
 
 /**
@@ -745,7 +746,7 @@ function export_metadata_plugin_hook($hook, $entity_type, $returnvalue, $params)
 
 /**
  * Takes in a comma-separated string and returns an array of tags
- * which have been trimmed and set to lower case
+ * which have been trimmed
  *
  * @param string $string Comma-separated tag string
  *
@@ -754,12 +755,7 @@ function export_metadata_plugin_hook($hook, $entity_type, $returnvalue, $params)
 function string_to_tag_array($string) {
 	if (is_string($string)) {
 		$ar = explode(",", $string);
-		// trim blank spaces
 		$ar = array_map('trim', $ar);
-		// make lower case : [Marcus Povey 20090605 - Using mb wrapper function
-		// using UTF8 safe function where available]
-		$ar = array_map('elgg_strtolower', $ar);
-		// Remove null values
 		$ar = array_filter($ar, 'is_not_null');
 		return $ar;
 	}
diff --git a/engine/lib/metastrings.php b/engine/lib/metastrings.php
index 62b60e279..d7cc4e0bc 100644
--- a/engine/lib/metastrings.php
+++ b/engine/lib/metastrings.php
@@ -727,38 +727,11 @@ function elgg_batch_metastring_based_objects(array $options, $callback) {
 		return false;
 	}
 
-	switch($options['metastring_type']) {
-		case 'metadata':
-			$objects = elgg_get_metadata($options);
-			break;
-
-		case 'annotations':
-			$objects = elgg_get_annotations($options);
-			break;
-
-		default:
-			return false;
-	}
-
-	if (!is_array($objects)) {
-		$r = false;
-	} elseif (empty($objects)) {
-		// ElggBatch returns null if the results are an empty array
-		$r = null;
-	} else {
-		$r = true;
-		foreach($objects as $object) {
-			$r = $r && $callback($object);
-		}
-	}
+	// @todo restore once ElggBatch supports callbacks that delete rows.
+	$batch = new ElggBatch('elgg_get_metastring_based_objects', $options, $callback, 50, false);
+	$r = $batch->callbackResult;
 
 	return $r;
-
-//	// @todo restore once ElggBatch supports callbacks that delete rows.
-//	$batch = new ElggBatch('elgg_get_metastring_based_objects', $options, $callback);
-//	$r = $batch->callbackResult;
-//
-//	return $r;
 }
 
 /**
diff --git a/engine/lib/navigation.php b/engine/lib/navigation.php
index dcbd7b397..a7984ce5a 100644
--- a/engine/lib/navigation.php
+++ b/engine/lib/navigation.php
@@ -78,7 +78,11 @@
  *                          link_class  => STR  A class or classes for the <a> tag
  *                          item_class  => STR  A class or classes for the <li> tag
  *
- *                          Custom options can be added as key value pairs.
+ *                          Additional options that the view output/url takes can be
+ *							passed in the array. If the 'confirm' key is passed, the
+ *							menu link uses the 'output/confirmlink' view. Custom
+ *							options can be added by using the 'data' key with the
+ *							value being an associative array.
  *
  * @return bool
  * @since 1.8.0
diff --git a/engine/lib/output.php b/engine/lib/output.php
index b96cf354c..b1245a924 100644
--- a/engine/lib/output.php
+++ b/engine/lib/output.php
@@ -310,15 +310,19 @@ function elgg_get_friendly_title($title) {
 		return $result;
 	}
 
+	// @todo not using this because of locale concerns
 	//$title = iconv('UTF-8', 'ASCII//TRANSLIT', $title);
 
+	// @todo this uses a utf8 character class. can use if
+	// we want to support utf8 in the url.
+	//$title = preg_replace('/[^\p{L}\- ]/u', '', $title);
+
 	// use A-Za-z0-9_ instead of \w because \w is locale sensitive
-	$title = preg_replace("/[^A-Za-z0-9_ ]/", "", $title);
-	$title = preg_replace("/[^\w ]/", "", $title);
+	$title = preg_replace("/[^A-Za-z0-9_\- ]/", "", $title);
 	$title = str_replace(" ", "-", $title);
 	$title = str_replace("--", "-", $title);
 	$title = trim($title);
-	$title = strtolower($title);
+	$title = elgg_strtolower($title);
 	return $title;
 }
 
diff --git a/engine/lib/plugins.php b/engine/lib/plugins.php
index 7968f4a6e..123fb18d8 100644
--- a/engine/lib/plugins.php
+++ b/engine/lib/plugins.php
@@ -62,7 +62,7 @@ function elgg_get_plugin_ids_in_dir($dir = null) {
 		$dir = elgg_get_plugins_path();
 	}
 
-	$plugin_idss = array();
+	$plugin_ids = array();
 	$handle = opendir($dir);
 
 	if ($handle) {
@@ -298,19 +298,13 @@ function elgg_load_plugins() {
 
 	// temporary disable all plugins if there is a file called 'disabled' in the plugin dir
 	if (file_exists("$plugins_path/disabled")) {
+		if (elgg_is_admin_logged_in() && elgg_in_context('admin')) {
+			system_message(elgg_echo('plugins:disabled'));
+		}
 		return false;
 	}
 
-	// Load view caches if available
-	$cached_view_paths = elgg_filepath_cache_load('views');
-	$cached_view_types = elgg_filepath_cache_load('view_types');
-	$cached_view_info = is_string($cached_view_paths) && is_string($cached_view_types);
-
-	if ($cached_view_info) {
-		$CONFIG->views = unserialize($cached_view_paths);
-		$CONFIG->view_types = unserialize($cached_view_types);
-
-		// don't need to register views
+	if (elgg_get_config('system_cache_loaded')) {
 		$start_flags = $start_flags & ~ELGG_PLUGIN_REGISTER_VIEWS;
 	}
 
@@ -332,12 +326,6 @@ function elgg_load_plugins() {
 		}
 	}
 
-	// Cache results
-	if (!$cached_view_info) {
-		elgg_filepath_cache_save('views', serialize($CONFIG->views));
-		elgg_filepath_cache_save('view_types', serialize($CONFIG->view_types));
-	}
-
 	return $return;
 }
 
diff --git a/engine/lib/relationships.php b/engine/lib/relationships.php
index fabe2d2d6..f50c4a485 100644
--- a/engine/lib/relationships.php
+++ b/engine/lib/relationships.php
@@ -290,7 +290,7 @@ function elgg_get_entities_from_relationship($options) {
 			$options['selects'] = array();
 		}
 
-		$select = array('r.*');
+		$select = array('r.id');
 
 		$options['selects'] = array_merge($options['selects'], $select);
 	}
diff --git a/engine/lib/sessions.php b/engine/lib/sessions.php
index 97a05e2e8..419d36707 100644
--- a/engine/lib/sessions.php
+++ b/engine/lib/sessions.php
@@ -127,6 +127,10 @@ function elgg_is_admin_user($user_guid) {
 /**
  * Perform user authentication with a given username and password.
  *
+ * @warning This returns an error message on failure. Use the identical operator to check
+ * for access: if (true === elgg_authenticate()) { ... }.
+ *
+ *
  * @see login
  *
  * @param string $username The username
@@ -355,7 +359,7 @@ function logout() {
 	session_destroy();
 
 	// starting a default session to store any post-logout messages.
-	session_init(NULL, NULL, NULL);
+	_elgg_session_boot(NULL, NULL, NULL);
 	$_SESSION['msg'] = $old_msg;
 
 	return TRUE;
@@ -379,7 +383,7 @@ function logout() {
  * @return bool
  * @access private
  */
-function session_init($event, $object_type, $object) {
+function _elgg_session_boot($event, $object_type, $object) {
 	global $DB_PREFIX, $CONFIG;
 
 	// Use database for sessions
@@ -444,8 +448,8 @@ function session_init($event, $object_type, $object) {
 		set_last_action($_SESSION['guid']);
 	}
 
-	elgg_register_action("login", '', 'public');
-	elgg_register_action("logout");
+	elgg_register_action('login', '', 'public');
+	elgg_register_action('logout');
 
 	// Register a default PAM handler
 	register_pam_handler('pam_auth_userpass');
@@ -655,4 +659,4 @@ function _elgg_session_gc($maxlifetime) {
 	return true;
 }
 
-elgg_register_event_handler("boot", "system", "session_init", 20);
+elgg_register_event_handler('boot', 'system', '_elgg_session_boot', 2);
diff --git a/engine/lib/sites.php b/engine/lib/sites.php
index 337b2d180..850092cad 100644
--- a/engine/lib/sites.php
+++ b/engine/lib/sites.php
@@ -231,43 +231,6 @@ function get_site_domain($guid) {
 }
 
 /**
- * Initialise site handling
- *
- * Called at the beginning of system running, to set the ID of the current site.
- * This is 0 by default, but plugins may alter this behaviour by attaching functions
- * to the sites init event and changing $CONFIG->site_id.
- *
- * @uses $CONFIG
- *
- * @param string $event       Event API required parameter
- * @param string $object_type Event API required parameter
- * @param null   $object      Event API required parameter
- *
- * @return true
- * @access private
- */
-function sites_boot($event, $object_type, $object) {
-	global $CONFIG;
-
-	$site = elgg_trigger_plugin_hook("siteid", "system");
-	if ($site === null || $site === false) {
-		$CONFIG->site_id = (int) datalist_get('default_site');
-	} else {
-		$CONFIG->site_id = $site;
-	}
-	$CONFIG->site_guid = $CONFIG->site_id;
-	$CONFIG->site = get_entity($CONFIG->site_guid);
-
-	return true;
-}
-
-// Register event handlers
-elgg_register_event_handler('boot', 'system', 'sites_boot', 2);
-
-// Register with unit test
-elgg_register_plugin_hook_handler('unit_test', 'system', 'sites_test');
-
-/**
  * Unit tests for sites
  *
  * @param sting  $hook   unit_test
@@ -283,3 +246,6 @@ function sites_test($hook, $type, $value, $params) {
 	$value[] = "{$CONFIG->path}engine/tests/objects/sites.php";
 	return $value;
 }
+
+// Register with unit test
+elgg_register_plugin_hook_handler('unit_test', 'system', 'sites_test');
diff --git a/engine/lib/statistics.php b/engine/lib/statistics.php
index 7c170f3bb..e1f95ed97 100644
--- a/engine/lib/statistics.php
+++ b/engine/lib/statistics.php
@@ -95,14 +95,12 @@ function get_number_users($show_deactivated = false) {
  * @return string
   */
 function get_online_users() {
-	$offset = get_input('offset', 0);
 	$count = find_active_users(600, 10, $offset, true);
 	$objects = find_active_users(600, 10, $offset);
 
 	if ($objects) {
 		return elgg_view_entity_list($objects, array(
 			'count' => $count,
-			'offset' => $offset,
 			'limit' => 10
 		));
 	}
diff --git a/engine/lib/system_log.php b/engine/lib/system_log.php
index fd5644135..28d90be56 100644
--- a/engine/lib/system_log.php
+++ b/engine/lib/system_log.php
@@ -11,6 +11,7 @@
  * Retrieve the system log based on a number of parameters.
  *
  * @param int|array $by_user    The guid(s) of the user(s) who initiated the event.
+ *                              Use 0 for unowned entries. Anything else falsey means anyone.
  * @param string    $event      The event you are searching on.
  * @param string    $class      The class of object it effects.
  * @param string    $type       The type
@@ -21,11 +22,12 @@
  * @param int       $timebefore Lower time limit
  * @param int       $timeafter  Upper time limit
  * @param int       $object_id  GUID of an object
- *
+ * @param str       $ip_address The IP address.
  * @return mixed
  */
 function get_system_log($by_user = "", $event = "", $class = "", $type = "", $subtype = "",
-$limit = 10, $offset = 0, $count = false, $timebefore = 0, $timeafter = 0, $object_id = 0) {
+$limit = 10, $offset = 0, $count = false, $timebefore = 0, $timeafter = 0, $object_id = 0,
+$ip_address = false) {
 
 	global $CONFIG;
 
@@ -37,16 +39,18 @@ $limit = 10, $offset = 0, $count = false, $timebefore = 0, $timeafter = 0, $obje
 	} else {
 		$by_user = (int)$by_user;
 	}
+	
 	$event = sanitise_string($event);
 	$class = sanitise_string($class);
 	$type = sanitise_string($type);
 	$subtype = sanitise_string($subtype);
+	$ip_address = sanitise_string($ip_address);
 	$limit = (int)$limit;
 	$offset = (int)$offset;
 
 	$where = array();
 
-	if ($by_user_orig !== "") {
+	if ($by_user_orig !== "" && $by_user_orig !== false && $by_user_orig !== null) {
 		if (is_int($by_user)) {
 			$where[] = "performed_by_guid=$by_user";
 		} else if (is_array($by_user)) {
@@ -75,6 +79,9 @@ $limit = 10, $offset = 0, $count = false, $timebefore = 0, $timeafter = 0, $obje
 	if ($object_id) {
 		$where[] = "object_id = " . ((int) $object_id);
 	}
+	if ($ip_address) {
+		$where[] = "ip_address = '$ip_address'";
+	}
 
 	$select = "*";
 	if ($count) {
@@ -91,7 +98,8 @@ $limit = 10, $offset = 0, $count = false, $timebefore = 0, $timeafter = 0, $obje
 	}
 
 	if ($count) {
-		if ($numrows = get_data_row($query)) {
+		$numrows = get_data_row($query);
+		if ($numrows) {
 			return $numrows->count;
 		}
 	} else {
@@ -171,6 +179,7 @@ function system_log($object, $event) {
 		$object_subtype = $object->getSubtype();
 		$event = sanitise_string($event);
 		$time = time();
+		$ip_address = sanitise_string($_SERVER['REMOTE_ADDR']);
 		$performed_by = elgg_get_logged_in_user_guid();
 
 		if (isset($object->access_id)) {
@@ -194,10 +203,10 @@ function system_log($object, $event) {
 		if (!isset($log_cache[$time][$object_id][$event])) {
 			$query = "INSERT DELAYED into {$CONFIG->dbprefix}system_log
 				(object_id, object_class, object_type, object_subtype, event,
-				performed_by_guid, owner_guid, access_id, enabled, time_created)
+				performed_by_guid, owner_guid, access_id, enabled, time_created, ip_address)
 			VALUES
 				('$object_id','$object_class','$object_type', '$object_subtype', '$event',
-				$performed_by, $owner_guid, $access_id, '$enabled', '$time')";
+				$performed_by, $owner_guid, $access_id, '$enabled', '$time', '$ip_address')";
 
 			insert_data($query);
 
diff --git a/engine/lib/upgrades/2011010101.php b/engine/lib/upgrades/2011010101.php
index b063c249b..a1ee92622 100644
--- a/engine/lib/upgrades/2011010101.php
+++ b/engine/lib/upgrades/2011010101.php
@@ -66,7 +66,7 @@ if ($old_enabled_plugins) {
 
 // invalidate caches
 elgg_invalidate_simplecache();
-elgg_filepath_cache_reset();
+elgg_reset_system_cache();
 
 // clean up.
 remove_metadata($site->guid, 'pluginorder');
diff --git a/engine/lib/upgrades/2012012000-1.8.3-ip_in_syslog-87fe0f068cf62428.php b/engine/lib/upgrades/2012012000-1.8.3-ip_in_syslog-87fe0f068cf62428.php
new file mode 100644
index 000000000..b9514e156
--- /dev/null
+++ b/engine/lib/upgrades/2012012000-1.8.3-ip_in_syslog-87fe0f068cf62428.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Elgg 1.8.3 upgrade 2012012000
+ * ip_in_syslog
+ *
+ * Adds a field for an IP address in the system log table
+ */
+
+$db_prefix = elgg_get_config('dbprefix');
+$q = "ALTER TABLE {$db_prefix}system_log ADD ip_address VARCHAR(15) NOT NULL AFTER time_created";
+
+update_data($q);
\ No newline at end of file
diff --git a/engine/lib/upgrades/2012012100-1.8.3-system_cache-93100e7d55a24a11.php b/engine/lib/upgrades/2012012100-1.8.3-system_cache-93100e7d55a24a11.php
new file mode 100644
index 000000000..3a9aae2a1
--- /dev/null
+++ b/engine/lib/upgrades/2012012100-1.8.3-system_cache-93100e7d55a24a11.php
@@ -0,0 +1,13 @@
+<?php
+/**
+ * Elgg 1.8.3 upgrade 2012012100
+ * system_cache
+ *
+ * Convert viewpath cache to system cache
+ */
+
+$value = datalist_get('viewpath_cache_enabled');
+datalist_set('system_cache_enabled', $value);
+
+$query = "DELETE FROM {$CONFIG->dbprefix}datalists WHERE name='viewpath_cache_enabled'";
+delete_data($query);
diff --git a/engine/lib/upgrades/2012041800-1.8.3-dont_filter_passwords-c0ca4a18b38ae2bc.php b/engine/lib/upgrades/2012041800-1.8.3-dont_filter_passwords-c0ca4a18b38ae2bc.php
new file mode 100644
index 000000000..b82ffbebf
--- /dev/null
+++ b/engine/lib/upgrades/2012041800-1.8.3-dont_filter_passwords-c0ca4a18b38ae2bc.php
@@ -0,0 +1,11 @@
+<?php
+/**
+ * Elgg 1.8.3 upgrade 2012041800
+ * dont_filter_passwords
+ *
+ * Add admin notice that password handling has changed and if 
+ * users can't login to have them reset their passwords.
+ */
+elgg_add_admin_notice('dont_filter_passwords', 'Password handling has been updated to be more secure and flexible. '
+	. 'This change may prevent a small number of users from logging in with their existing passwords. '
+	. 'If a user is unable to log in, please advise him or her to reset their password, or reset it as an admin user.');
diff --git a/engine/lib/upgrades/2012041801-1.8.3-multiple_user_tokens-852225f7fd89f6c5.php b/engine/lib/upgrades/2012041801-1.8.3-multiple_user_tokens-852225f7fd89f6c5.php
new file mode 100644
index 000000000..07732f261
--- /dev/null
+++ b/engine/lib/upgrades/2012041801-1.8.3-multiple_user_tokens-852225f7fd89f6c5.php
@@ -0,0 +1,13 @@
+<?php
+/**
+ * Elgg 1.8.3 upgrade 2012041801
+ * multiple_user_tokens
+ *
+ * Fixes http://trac.elgg.org/ticket/4291
+ * Removes the unique index on users_apisessions for user_guid and site_guid
+ */
+
+$db_prefix = elgg_get_config('dbprefix');
+$q = "ALTER TABLE {$db_prefix}users_apisessions DROP INDEX user_guid,
+	ADD INDEX user_guid (user_guid, site_guid)";
+update_data($q);
\ No newline at end of file
diff --git a/engine/lib/user_settings.php b/engine/lib/user_settings.php
index af30d8f0d..e4069fb53 100644
--- a/engine/lib/user_settings.php
+++ b/engine/lib/user_settings.php
@@ -33,9 +33,9 @@ function users_settings_save() {
  * @access private
  */
 function elgg_set_user_password() {
-	$current_password = get_input('current_password');
-	$password = get_input('password');
-	$password2 = get_input('password2');
+	$current_password = get_input('current_password', null, false);
+	$password = get_input('password', null, false);
+	$password2 = get_input('password2', null, false);
 	$user_guid = get_input('guid');
 
 	if (!$user_guid) {
diff --git a/engine/lib/users.php b/engine/lib/users.php
index c38bb676e..6a881777e 100644
--- a/engine/lib/users.php
+++ b/engine/lib/users.php
@@ -497,20 +497,26 @@ $timelower = 0, $timeupper = 0) {
  * @param int    $timelower      The earliest time the entity can have been created. Default: all
  * @param int    $timeupper      The latest time the entity can have been created. Default: all
  *
- * @return string The list in a form suitable to display
+ * @return string
  */
 function list_user_friends_objects($user_guid, $subtype = "", $limit = 10, $full_view = true,
 $listtypetoggle = true, $pagination = true, $timelower = 0, $timeupper = 0) {
 
-	$offset = (int) get_input('offset');
-	$limit = (int) $limit;
-	$count = (int) count_user_friends_objects($user_guid, $subtype, $timelower, $timeupper);
+	$offset = (int)get_input('offset');
+	$limit = (int)$limit;
+	$count = (int)count_user_friends_objects($user_guid, $subtype, $timelower, $timeupper);
 
 	$entities = get_user_friends_objects($user_guid, $subtype, $limit, $offset,
 		$timelower, $timeupper);
 
-	return elgg_view_entity_list($entities, $count, $offset, $limit, $full_view,
-		$listtypetoggle, $pagination);
+	return elgg_view_entity_list($entities, array(
+		'count' => $count,
+		'offset' => $offset,
+		'limit' => $limit,
+		'full_view' => $full_view,
+		'list_type_toggle' => $listtypetoggle,
+		'pagination' => $pagination,
+	));
 }
 
 /**
@@ -606,11 +612,11 @@ function get_user_by_code($code) {
 }
 
 /**
- * Get an array of users from their email addresses
+ * Get an array of users from an email address
  *
  * @param string $email Email address.
  *
- * @return Array of users
+ * @return array
  */
 function get_user_by_email($email) {
 	global $CONFIG;
@@ -963,8 +969,8 @@ $allow_multiple_emails = false, $friend_guid = 0, $invitecode = '') {
 				$friend_user->addFriend($user->guid);
 
 				// @todo Should this be in addFriend?
-				add_to_river('friends/river/create', 'friend', $user->getGUID(), $friend_guid);
-				add_to_river('friends/river/create', 'friend', $friend_guid, $user->getGUID());
+				add_to_river('river/relationship/friend/create', 'friend', $user->getGUID(), $friend_guid);
+				add_to_river('river/relationship/friend/create', 'friend', $friend_guid, $user->getGUID());
 			}
 		}
 	}
diff --git a/engine/lib/views.php b/engine/lib/views.php
index e59edac96..ca0ce7196 100644
--- a/engine/lib/views.php
+++ b/engine/lib/views.php
@@ -560,7 +560,7 @@ function elgg_view($view, $vars = array(), $bypass = false, $debug = false, $vie
  *
  * @return void
  * @since 1.7.0
- * @link http://docs.elgg.org/Views/Ejxtend
+ * @link http://docs.elgg.org/Views/Extend
  * @example views/extend.php
  */
 function elgg_extend_view($view, $view_extension, $priority = 501, $viewtype = '') {
@@ -969,12 +969,7 @@ function elgg_view_annotation(ElggAnnotation $annotation, array $vars = array(),
 		return elgg_view($view, $vars, $bypass, $debug);
 	}
 
-	// @todo would be better to always make sure name is initialized properly
 	$name = $annotation->name;
-	$intname = (int) $name;
-	if ("{$intname}" == "{$name}") {
-		$name = get_metastring($intname);
-	}
 	if (empty($name)) {
 		return false;
 	}
@@ -1330,21 +1325,18 @@ function elgg_view_form($action, $form_vars = array(), $body_vars = array()) {
  * @access private
  */
 function elgg_view_list_item($item, array $vars = array()) {
+	global $CONFIG;
 
-	switch ($item->getType()) {
-		case 'user':
-		case 'object':
-		case 'group':
-		case 'site':
-			return elgg_view_entity($item, $vars);
-		case 'annotation':
-			return elgg_view_annotation($item, $vars);
-		case 'river':
-			return elgg_view_river_item($item, $vars);
-		default:
-			return false;
-			break;
+	$type = $item->getType();
+	if (in_array($type, $CONFIG->entity_types)) {
+		return elgg_view_entity($item, $vars);
+	} else if ($type == 'annotation') {
+		return elgg_view_annotation($item, $vars);
+	} else if ($type == 'river') {
+		return elgg_view_river_item($item, $vars);
 	}
+
+	return false;
 }
 
 /**
@@ -1671,5 +1663,5 @@ function elgg_views_boot() {
 	}
 }
 
-elgg_register_event_handler('boot', 'system', 'elgg_views_boot', 1000);
+elgg_register_event_handler('boot', 'system', 'elgg_views_boot');
 elgg_register_event_handler('init', 'system', 'elgg_views_handle_deprecated_views');
diff --git a/engine/lib/web_services.php b/engine/lib/web_services.php
index 07be76ec6..da3ed76a9 100644
--- a/engine/lib/web_services.php
+++ b/engine/lib/web_services.php
@@ -1165,7 +1165,7 @@ function list_all_apis() {
  * @access private
  */
 function auth_gettoken($username, $password) {
-	if (elgg_authenticate($username, $password)) {
+	if (true === elgg_authenticate($username, $password)) {
 		$token = create_user_token($username);
 		if ($token) {
 			return $token;
diff --git a/engine/lib/xml-rpc.php b/engine/lib/xml-rpc.php
new file mode 100644
index 000000000..bfe1a8645
--- /dev/null
+++ b/engine/lib/xml-rpc.php
@@ -0,0 +1,203 @@
+<?php
+/**
+ * Elgg XML-RPC library.
+ * Contains functions and classes to handle XML-RPC services, currently only server only.
+ *
+ * @package Elgg.Core
+ * @subpackage XMLRPC
+ */
+
+/**
+ * parse XMLRPCCall parameters
+ *
+ * Convert an XMLRPCCall result array into native data types
+ *
+ * @param array $parameters An array of params
+ *
+ * @return array
+ * @access private
+ */
+function xmlrpc_parse_params($parameters) {
+	$result = array();
+
+	foreach ($parameters as $parameter) {
+		$result[] = xmlrpc_scalar_value($parameter);
+	}
+
+	return $result;
+}
+
+/**
+ * Extract the scalar value of an XMLObject type result array
+ *
+ * @param XMLObject $object And object
+ *
+ * @return mixed
+ * @access private
+ */
+function xmlrpc_scalar_value($object) {
+	if ($object->name == 'param') {
+		$object = $object->children[0]->children[0];
+	}
+
+	switch ($object->name) {
+		case 'string':
+			return $object->content;
+
+		case 'array':
+			foreach ($object->children[0]->children as $child) {
+				$value[] = xmlrpc_scalar_value($child);
+			}
+			return $value;
+
+		case 'struct':
+			foreach ($object->children as $child) {
+				if (isset($child->children[1]->children[0])) {
+					$value[$child->children[0]->content] = xmlrpc_scalar_value($child->children[1]->children[0]);
+				} else {
+					$value[$child->children[0]->content] = $child->children[1]->content;
+				}
+			}
+			return $value;
+
+		case 'boolean':
+			return (boolean) $object->content;
+
+		case 'i4':
+		case 'int':
+			return (int) $object->content;
+
+		case 'double':
+			return (double) $object->content;
+
+		case 'dateTime.iso8601':
+			return (int) strtotime($object->content);
+
+		case 'base64':
+			return base64_decode($object->content);
+
+		case 'value':
+			return xmlrpc_scalar_value($object->children[0]);
+
+		default:
+			// @todo unsupported, throw an error
+			return false;
+	}
+}
+
+// Functions for adding handlers //////////////////////////////////////////////////////////
+
+/** XML-RPC Handlers */
+global $XML_RPC_HANDLERS;
+$XML_RPC_HANDLERS = array();
+
+/**
+ * Register a method handler for a given XML-RPC method.
+ *
+ * @param string $method  Method parameter.
+ * @param string $handler The handler function. This function accepts
+ *                        one XMLRPCCall object and must return a XMLRPCResponse object.
+ *
+ * @return bool
+ */
+function register_xmlrpc_handler($method, $handler) {
+	global $XML_RPC_HANDLERS;
+
+	$XML_RPC_HANDLERS[$method] = $handler;
+}
+
+/**
+ * Trigger a method call and pass the relevant parameters to the funciton.
+ *
+ * @param XMLRPCCall $parameters The call and parameters.
+ *
+ * @return XMLRPCCall
+ * @access private
+ */
+function trigger_xmlrpc_handler(XMLRPCCall $parameters) {
+	global $XML_RPC_HANDLERS;
+
+	// Go through and see if we have a handler
+	if (isset($XML_RPC_HANDLERS[$parameters->getMethodName()])) {
+		$handler = $XML_RPC_HANDLERS[$parameters->getMethodName()];
+		$result  = $handler($parameters);
+
+		if (!($result instanceof XMLRPCResponse)) {
+			$msg = elgg_echo('InvalidParameterException:UnexpectedReturnFormat',
+				array($parameters->getMethodName()));
+			throw new InvalidParameterException($msg);
+		}
+
+		// Result in right format, return it.
+		return $result;
+	}
+
+	// if no handler then throw exception
+	$msg = elgg_echo('NotImplementedException:XMLRPCMethodNotImplemented',
+		array($parameters->getMethodName()));
+	throw new NotImplementedException($msg);
+}
+
+/**
+ * PHP Error handler function.
+ * This function acts as a wrapper to catch and report PHP error messages.
+ *
+ * @see http://uk3.php.net/set-error-handler
+ *
+ * @param int    $errno    Error number
+ * @param string $errmsg   Human readable message
+ * @param string $filename Filename
+ * @param int    $linenum  Line number
+ * @param array  $vars     Vars
+ *
+ * @return void
+ * @access private
+ */
+function _php_xmlrpc_error_handler($errno, $errmsg, $filename, $linenum, $vars) {
+	$error = date("Y-m-d H:i:s (T)") . ": \"" . $errmsg . "\" in file "
+		. $filename . " (line " . $linenum . ")";
+
+	switch ($errno) {
+		case E_USER_ERROR:
+				error_log("ERROR: " . $error);
+
+				// Since this is a fatal error, we want to stop any further execution but do so gracefully.
+				throw new Exception("ERROR: " . $error);
+			break;
+
+		case E_WARNING :
+		case E_USER_WARNING :
+				error_log("WARNING: " . $error);
+			break;
+
+		default:
+			error_log("DEBUG: " . $error);
+	}
+}
+
+/**
+ * PHP Exception handler for XMLRPC.
+ *
+ * @param Exception $exception The exception
+ *
+ * @return void
+ * @access private
+ */
+function _php_xmlrpc_exception_handler($exception) {
+
+	error_log("*** FATAL EXCEPTION (XML-RPC) *** : " . $exception);
+
+	$code = $exception->getCode();
+
+	if ($code == 0) {
+		$code = -32400;
+	}
+
+	$result = new XMLRPCErrorResponse($exception->getMessage(), $code);
+
+	$vars = array('result' => $result);
+
+	$content = elgg_view("xml-rpc/output", $vars);
+
+	echo elgg_view_page($exception->getMessage(), $content);
+}
diff --git a/engine/schema/mysql.sql b/engine/schema/mysql.sql
index 74cf2ce74..6c6e9db89 100644
--- a/engine/schema/mysql.sql
+++ b/engine/schema/mysql.sql
@@ -361,6 +361,7 @@ CREATE TABLE `prefix_system_log` (
   `access_id` int(11) NOT NULL,
   `enabled` enum('yes','no') NOT NULL DEFAULT 'yes',
   `time_created` int(11) NOT NULL,
+  `ip_address` varchar(15) NOT NULL,
   PRIMARY KEY (`id`),
   KEY `object_id` (`object_id`),
   KEY `object_class` (`object_class`),
diff --git a/engine/settings.example.php b/engine/settings.example.php
index e42f3e9c6..3b139d710 100644
--- a/engine/settings.example.php
+++ b/engine/settings.example.php
@@ -107,7 +107,7 @@ $CONFIG->broken_mta = FALSE;
  *
  * Elgg stores each query and its results in a query cache.
  * On large sites or long-running scripts, this cache can grow to be
- * large.  To disable query caching, set this to FALSE.
+ * large.  To disable query caching, set this to TRUE.
  *
  * @global bool $CONFIG->db_disable_query_cache
  */
@@ -121,14 +121,3 @@ $CONFIG->db_disable_query_cache = FALSE;
  * @global int $CONFIG->min_password_length
  */
 $CONFIG->min_password_length = 6;
-
-/**
- * Multisite
- * 
- * Override settings with the domain-specific seed configuration
- */
-$settings_path  = dirname(__FILE__); // Change it to "/srv/seeds/" if you can
-$settings_path .= $_SERVER['HTTP_HOST']."/settings.php";
-if (is_readable($settings_path)) {
-	include($settings_path);
-}
diff --git a/engine/start.php b/engine/start.php
index 1decc5d80..506e27380 100644
--- a/engine/start.php
+++ b/engine/start.php
@@ -1,12 +1,12 @@
 <?php
 /**
- * Bootstraps and starts the Elgg engine.
+ * Bootstraps the Elgg engine.
  *
  * This file loads the full Elgg engine, checks the installation
- * state, then emits a series of events to finish booting Elgg:
+ * state, and triggers a series of events to finish booting Elgg:
  * 	- {@elgg_event boot system}
- * 	- {@elgg_event plugins_boot system}
  * 	- {@elgg_event init system}
+ * 	- {@elgg_event ready system}
  *
  * If Elgg is fully uninstalled, the browser will be redirected to an
  * installation page.
@@ -36,13 +36,12 @@ $START_MICROTIME = microtime(true);
  * Configuration values.
  *
  * The $CONFIG global contains configuration values required
- * for running Elgg as defined in the settings.php file.  The following
- * array keys are defined by core Elgg:
+ * for running Elgg as defined in the settings.php file.
  *
- * Plugin authors are encouraged to use get_config() instead of accessing the
- * global directly.
+ * Plugin authors are encouraged to use elgg_get_config() instead of accessing
+ * the global directly.
  *
- * @see get_config()
+ * @see elgg_get_config()
  * @see engine/settings.php
  * @global stdClass $CONFIG
  */
@@ -53,105 +52,58 @@ if (!isset($CONFIG)) {
 
 $lib_dir = dirname(__FILE__) . '/lib/';
 
-/**
- * The minimum required libs to bootstrap an Elgg installation.
- *
- * @var array
- */
-$required_files = array(
-	'elgglib.php', 'views.php', 'access.php', 'system_log.php', 'export.php',
-	'sessions.php', 'languages.php', 'pageowner.php', 'input.php', 'cache.php',
-	'output.php'
-);
-
-// include bootstraping libs
-foreach ($required_files as $file) {
-	$path = $lib_dir . $file;
-	if (!include($path)) {
-		echo "Could not load file '$path'. "
-		. 'Please check your Elgg installation for all required files.';
-		exit;
-	}
+// Load the bootstrapping library
+$path = $lib_dir . 'elgglib.php';
+if (!include_once($path)) {
+	echo "Could not load file '$path'. Please check your Elgg installation for all required files.";
+	exit;
 }
 
-// Register the error handler
-set_error_handler('_elgg_php_error_handler');
-set_exception_handler('_elgg_php_exception_handler');
-
-/**
- * Load the system settings
- */
+// Load the system settings
 if (!include_once(dirname(__FILE__) . "/settings.php")) {
-	$msg = elgg_echo('InstallationException:CannotLoadSettings');
+	$msg = 'Elgg could not load the settings file. It does not exist or there is a file permissions issue.';
 	throw new InstallationException($msg);
 }
 
 
 // load the rest of the library files from engine/lib/
 $lib_files = array(
-	// these need to be loaded first.
-	'database.php', 'actions.php',
-
-	'admin.php', 'annotations.php',
-	'configuration.php', 'cron.php', 'entities.php', 'export.php',
-	'extender.php', 'filestore.php', 'group.php', 
-	'location.php', 'mb_wrapper.php', 'memcache.php', 'metadata.php',
-	'metastrings.php', 'navigation.php', 'notification.php', 'objects.php',
-	'opendd.php', 'pagehandler.php', 'pam.php', 'plugins.php',
-	'private_settings.php', 'relationships.php', 'river.php', 'sites.php',
-	'statistics.php', 'tags.php', 'user_settings.php', 'users.php',
-	'upgrade.php', 'web_services.php', 'widgets.php', 'xml.php',
+	'access.php', 'actions.php', 'admin.php', 'annotations.php', 'cache.php',
+	'calendar.php', 'configuration.php', 'cron.php', 'database.php',
+	'entities.php', 'export.php', 'extender.php', 'filestore.php', 'group.php',
+	'input.php', 'languages.php', 'location.php', 'mb_wrapper.php',
+	'memcache.php', 'metadata.php', 'metastrings.php', 'navigation.php',
+	'notification.php', 'objects.php', 'opendd.php', 'output.php',
+	'pagehandler.php', 'pageowner.php', 'pam.php', 'plugins.php',
+	'private_settings.php', 'relationships.php', 'river.php', 'sessions.php',
+	'sites.php', 'statistics.php', 'system_log.php', 'tags.php',
+	'user_settings.php', 'users.php', 'upgrade.php', 'views.php',
+	'web_services.php', 'widgets.php', 'xml.php', 'xml-rpc.php',
 	
 	// backward compatibility
-	'deprecated-1.7.php', 'deprecated-1.8.php', 'deprecated-1.9.php'
+	'deprecated-1.7.php', 'deprecated-1.8.php',
 );
 
 foreach ($lib_files as $file) {
 	$file = $lib_dir . $file;
 	elgg_log("Loading $file...");
 	if (!include_once($file)) {
-		$msg = sprintf(elgg_echo('InstallationException:MissingLibrary'), $file);
+		$msg = "Could not load $file";
 		throw new InstallationException($msg);
 	}
 }
 
-// connect to db
-setup_db_connections();
-
-// confirm that the installation completed successfully
-verify_installation();
-
-// Autodetect some default configuration settings
-set_default_config();
-
-// needs to be set for links in html head
-$viewtype = get_input('view', 'default');
-$lastcached = datalist_get("simplecache_lastcached_$viewtype");
-$CONFIG->lastcache = $lastcached;
-
-// Trigger boot events for core. Plugins can't hook
-// into this because they haven't been loaded yet.
+// Connect to database, load language files, load configuration, init session
+// Plugins can't use this event because they haven't been loaded yet.
 elgg_trigger_event('boot', 'system');
 
 // Load the plugins that are active
 elgg_load_plugins();
+// @todo deprecate as plugins can use 'init', 'system' event
 elgg_trigger_event('plugins_boot', 'system');
 
-// Trigger system init event for plugins
+// Complete the boot process for both engine and plugins
 elgg_trigger_event('init', 'system');
 
-// Regenerate the simple cache if expired.
-// Don't do it on upgrade because upgrade does it itself.
-// @todo - move into function and perhaps run off init system event
-if (!defined('UPGRADING')) {
-	$lastupdate = datalist_get("simplecache_lastupdate_$viewtype");
-	$lastcached = datalist_get("simplecache_lastcached_$viewtype");
-	if ($lastupdate == 0 || $lastcached < $lastupdate) {
-		elgg_regenerate_simplecache($viewtype);
-		$lastcached = datalist_get("simplecache_lastcached_$viewtype");
-	}
-	$CONFIG->lastcache = $lastcached;
-}
-
 // System loaded and ready
 elgg_trigger_event('ready', 'system');
diff --git a/engine/tests/api/helpers.php b/engine/tests/api/helpers.php
index 77205138d..62e4471e0 100644
--- a/engine/tests/api/helpers.php
+++ b/engine/tests/api/helpers.php
@@ -518,4 +518,87 @@ class ElggCoreHelpersTest extends ElggCoreUnitTest {
 
 		$this->assertIdentical($elements_sorted_string, $test_elements);
 	}
+
+	// see http://trac.elgg.org/ticket/4288
+	public function testElggBatchIncOffset() {
+		// normal increment
+		$options = array(
+			'offset' => 0,
+			'limit' => 11
+		);
+		$batch = new ElggBatch(array('ElggCoreHelpersTest', 'elgg_batch_callback_test'), $options,
+				null, 5);
+		$j = 0;
+		foreach ($batch as $e) {
+			$offset = floor($j / 5) * 5;
+			$this->assertEqual($offset, $e['offset']);
+			$this->assertEqual($j + 1, $e['index']);
+			$j++;
+		}
+
+		$this->assertEqual(11, $j);
+
+		// no increment, 0 start
+		ElggCoreHelpersTest::elgg_batch_callback_test(array(), true);
+		$options = array(
+			'offset' => 0,
+			'limit' => 11
+		);
+		$batch = new ElggBatch(array('ElggCoreHelpersTest', 'elgg_batch_callback_test'), $options,
+				null, 5);
+		$batch->setIncrementOffset(false);
+
+		$j = 0;
+		foreach ($batch as $e) {
+			$this->assertEqual(0, $e['offset']);
+			// should always be the same 5
+			$this->assertEqual($e['index'], $j + 1 - (floor($j / 5) * 5));
+			$j++;
+		}
+		$this->assertEqual(11, $j);
+
+		// no increment, 3 start
+		ElggCoreHelpersTest::elgg_batch_callback_test(array(), true);
+		$options = array(
+			'offset' => 3,
+			'limit' => 11
+		);
+		$batch = new ElggBatch(array('ElggCoreHelpersTest', 'elgg_batch_callback_test'), $options,
+				null, 5);
+		$batch->setIncrementOffset(false);
+
+		$j = 0;
+		foreach ($batch as $e) {
+			$this->assertEqual(3, $e['offset']);
+			// same 5 results
+			$this->assertEqual($e['index'], $j + 4 - (floor($j / 5) * 5));
+			$j++;
+		}
+
+		$this->assertEqual(11, $j);
+	}
+
+	static function elgg_batch_callback_test($options, $reset = false) {
+		static $count = 1;
+
+		if ($reset) {
+			$count = 1;
+			return true;
+		}
+
+		if ($count > 20) {
+			return false;
+		}
+
+		for ($j = 0; ($options['limit'] < 5) ? $j < $options['limit'] : $j < 5; $j++) {
+			$return[] = array(
+				'offset' => $options['offset'],
+				'limit' => $options['limit'],
+				'count' => $count++,
+				'index' => 1 + $options['offset'] + $j
+			);
+		}
+
+		return $return;
+	}
 }
\ No newline at end of file
diff --git a/engine/tests/api/metastrings.php b/engine/tests/api/metastrings.php
index a96388217..0a8945084 100644
--- a/engine/tests/api/metastrings.php
+++ b/engine/tests/api/metastrings.php
@@ -132,7 +132,7 @@ class ElggCoreMetastringsTest extends ElggCoreUnitTest {
 	public function testKeepMeFromDeletingEverything() {
 		foreach ($this->metastringTypes as $type) {
 			$required = array(
-				'guid', 'guids', 'limit'
+				'guid', 'guids'
 			);
 
 			switch ($type) {
@@ -160,6 +160,10 @@ class ElggCoreMetastringsTest extends ElggCoreUnitTest {
 			$options = array();
 			$this->assertFalse(elgg_is_valid_options_for_batch_operation($options, $type));
 
+			// limit alone isn't valid:
+			$options = array('limit' => 10);
+			$this->assertFalse(elgg_is_valid_options_for_batch_operation($options, $type));
+
 			foreach ($required as $key) {
 				$options = array();
 
diff --git a/engine/tests/objects/objects.php b/engine/tests/objects/objects.php
index 0d0df6b75..915594e0a 100644
--- a/engine/tests/objects/objects.php
+++ b/engine/tests/objects/objects.php
@@ -194,7 +194,99 @@ class ElggCoreObjectTest extends ElggCoreUnitTest {
 		$old = elgg_set_ignore_access(true);
 	}
 
+	// see http://trac.elgg.org/ticket/1196
+	public function testElggEntityRecursiveDisableWhenLoggedOut() {
+		$e1 = new ElggObject();
+		$e1->access_id = ACCESS_PUBLIC;
+		$e1->owner_guid = 0;
+		$e1->container_guid = 0;
+		$e1->save();
+		$guid1 = $e1->getGUID();
+
+		$e2 = new ElggObject();
+		$e2->container_guid = $guid1;
+		$e2->access_id = ACCESS_PUBLIC;
+		$e2->owner_guid = 0;
+		$e2->save();
+		$guid2 = $e2->getGUID();
+
+		// fake being logged out
+		$user = $_SESSION['user'];
+		unset($_SESSION['user']);
+		$ia = elgg_set_ignore_access(true);
+
+		$this->assertTrue(disable_entity($guid1, null, true));
+
+		// "log in" original user
+		$_SESSION['user'] = $user;
+		elgg_set_ignore_access($ia);
+
+		$this->assertFalse(get_entity($guid1));
+		$this->assertFalse(get_entity($guid2));
+
+		$db_prefix = get_config('dbprefix');
+		$q = "SELECT * FROM {$db_prefix}entities WHERE guid = $guid1";
+		$r = get_data_row($q);
+		$this->assertEqual('no', $r->enabled);
+
+		$q = "SELECT * FROM {$db_prefix}entities WHERE guid = $guid2";
+		$r = get_data_row($q);
+		$this->assertEqual('no', $r->enabled);
+
+		access_show_hidden_entities(true);
+		delete_entity($guid1);
+		delete_entity($guid2);
+		access_show_hidden_entities(false);
+	}
+
+	public function testElggRecursiveDelete() {
+		$types = array('ElggGroup', 'ElggObject', 'ElggUser', 'ElggSite');
+		$db_prefix = elgg_get_config('dbprefix');
+
+		foreach ($types as $type) {
+			$parent = new $type();
+			$this->assertTrue($parent->save());
+			
+			$child = new ElggObject();
+			$child->container_guid = $parent->guid;
+			$this->assertTrue($child->save());
+
+			$grandchild = new ElggObject();
+			$grandchild->container_guid = $child->guid;
+			$this->assertTrue($grandchild->save());
+
+			$this->assertTrue($parent->delete(true));
+
+			$q = "SELECT * FROM {$db_prefix}entities WHERE guid = $parent->guid";
+			$r = get_data($q);
+			$this->assertFalse($r);
+
+			$q = "SELECT * FROM {$db_prefix}entities WHERE guid = $child->guid";
+			$r = get_data($q);
+			$this->assertFalse($r);
 
+			$q = "SELECT * FROM {$db_prefix}entities WHERE guid = $grandchild->guid";
+			$r = get_data($q);
+			$this->assertFalse($r);
+		}
+
+		// object that owns itself
+		// can't check container_guid because of infinite loops in can_edit_entity()
+		$obj = new ElggObject();
+		$obj->save();
+		$obj->owner_guid = $obj->guid;
+		$obj->save();
+
+		$q = "SELECT * FROM {$db_prefix}entities WHERE guid = $obj->guid";
+		$r = get_data_row($q);
+		$this->assertEqual($obj->guid, $r->owner_guid);
+
+		$this->assertTrue($obj->delete(true));
+
+		$q = "SELECT * FROM {$db_prefix}entities WHERE guid = $obj->guid";
+		$r = get_data_row($q);
+		$this->assertFalse($r);
+	}
 
 	protected function get_object_row($guid) {
 		global $CONFIG;
diff --git a/engine/tests/regression/trac_bugs.php b/engine/tests/regression/trac_bugs.php
index 99cf81774..26a45ab6a 100644
--- a/engine/tests/regression/trac_bugs.php
+++ b/engine/tests/regression/trac_bugs.php
@@ -199,4 +199,22 @@ class ElggCoreRegressionBugsTest extends ElggCoreUnitTest {
 		$this->assertFalse($result);
 		$this->assertEqual(array(), $DB_DELAYED_QUERIES);
 	}
+
+	/**
+	 * http://trac.elgg.org/ticket/3210 - Don't remove -s in friendly titles
+	 * @todo: http://trac.elgg.org/ticket/2276 - improve char encoding
+	 */
+	public function test_friendly_title() {
+		$cases = array(
+			'Simple Test' => 'simple-test',
+			'Test top-level page' => 'test-top-level-page',
+//			'éclair' => 'éclair',
+//			'English, Español, and 日本語' => 'english-español-and-日本語'
+		);
+
+		foreach ($cases as $case => $expected) {
+			$friendly_title = elgg_get_friendly_title($case);
+			$this->assertIdentical($expected, $friendly_title);
+		}
+	}
 }