Version 1.8.0 (Jackie)
(??? from http://code.elgg.org/branches/1.8/)

 User-visible changes:
  * New default theme.
  * Separated admin interface.

 Generic API changes:
  * Added elgg_instanceof().
  * Added remove_subtype() and update_subtype().
  * Added elgg_format_url().
  * ElggDiskFilestore supports non-user owners.

 Deprecated APIs:
  * ElggAccess::get_ignore_access() by ElggAccess::getIgnoreAccess().
  * ElggAccess::set_ignore_access() by ElggAccess::setIgnoreAccess().
  * ElggCache::set_variable() by ElggCache::setVariable().
  * ElggCache::get_variable() by ElggCache::getVariable().
  * ElggDiskFilestore::make_directory_root() by ElggDiskFilestore::makeDirectoryRoot().
  * ElggDiskFilestore::make_file_matrix() and ElggDiskFilestore::user_file_matrix() by
    ElggDiskFilestore::makeFileMatrix().
  * ElggDiskFilestore::mb_string_split() removed.
  * ElggEntity::initialise_attriutes() by ElggEntity::initializeAttributes(). Same for
    all sub classes of ElggEntity.
  * ElggFileCache::create_file() by ::createFile().
  * ElggFileCache::sanitise_filename() by ::sanitizeFilename().
  * ElggMemcache::make_memcache_key() by ::_makeMemcacheKey().
  * ElggGroup::initialise_attributes() by ::initializeAttributes().
  * ElggPlugin::initialise_attributes() by ::initializeAttributes().
  * XMLRPCCall::parse() by XMLRPCCALL::_parse().
  * __get_annotations_calculate_x() by get_annotations_calculate_x().
  * __get_entities_from_annotations_calculate_x() by get_entities_from_annotations_calculate_x().
  * __php_api_error_handler() by _php_api_error_handler().
  * __php_api_exception_handler() by _php_api_exception_handler().
  * __elgg_php_error_handler() by _elgg_php_error_handler().
  * __elgg_php_exception_handler() by _elgg_php_exception_handler().
  * __process_element() by _process_element().
  * All __elgg_session_*() by _elgg_session_*().
  
 UI/UX API changes:
  * Added elgg_push_breadcrumb(), elgg_pop_breadcrumb(), and elgg_get_breadcrumbs().
  * Added navigation/breadcrumbs.
  * Added sticky form support with elgg_make_sticky_form(), 
    elgg_clear_sticky_form(), elgg_is_sticky_form(), and elgg_get_sticky_value().


Version 1.7.2
(August 18, 2010 from http://code.elgg.org/elgg/branches/1.7)

 UI Changes:
  * Group "widgets" have been standardized with new blog and bookmark widgets.
  * New group member listing page.
  * Group forum topics can be edited including title and status.
  * Added a group creation river entry.

 Bugfixes:
  * Fixed preview and draft saving for blog plugin.
  * Page titles are now editable.
  * Fixed several bugs with the new elgg_get* and elgg_list* functions.
  * Groups do not show up as personal friend collections anymore.
  * Fixed an upgrade issue with utf8 usernames.
  * Encoding of & in group forums is fixed.

 API changes:
  * Added elgg_list_entities_from_metadata().
  * Added elgg_send_email().
  * Added remove_from_river_by_id().
  * Added remove_from_register() for removing menu items.
  * Added elgg_get_excerpt().
  * Added elgg_get_friendly_title() and elgg_get_friendly_time().


Version 1.7.1
(April 21, 2010 from http://code.elgg.org/elgg/branches/1.7)

 UI changes:
  * (Unused) tags field removed from external pages.
  * Languages fixes in groups.
  * Installation checks database settings before writing settings.php.
  * Made the widgets more consistent in their UI.

 Bugfixes:
  * Pagination fixed.
  * Profile icons fixed for PHP-CGI users who were seeing incorrect avatars.
  * Tag search works in groups and members.
  * Tag clouds correctly link to tag search.
  * RSS views added to search.
  * Wrapper function for get_entities() correctly rewrites container_guid to 
    owner_guid.
  * output/url correctly appends http:// again.
  * full_url() urlencode()'s ' and " to avoid a security problem in IE.
  
 API changes:
  * Moved admin flag to users_entity table and added ElggUser->isAdmin(), 
    ->makeAdmin(), and ->removeAdmin() to replace the metadata.
  * Plugin hook for reported content includes the report object.
  * UTF8 upgrade checks server defaults before running to avoid
    corrupted strings.
  * Tags lib updated to elgg_get_*() interface.
  * Can get entities based upon annotation/metadata owner_guid.
  * Moved friendly time and friendly title into overridable views.
  * Added unregister_notification_handler().
  * Added remove_widget_type().
  * Search supports container_guid.


Version 1.7.0
(March 2, 2010 from http://code.elgg.org/elgg/trunk/)

 User-visible changes:
  * UTF8 now saved correctly in database. #1151
  * Unit tests added to System diagnostics.
  * Debug values output to screen when enabled in admin settings.
  * Users can now log in from multiple computers or browsers concurrently.
  * Misconfigured plugins no longer break the site. #1454
  * User display names cannot have HTML or be longer than 50 characters.
  * New search system.

 Bugfixes:
  * Searching by tag with extended characters now works. #1151, #1231
  * Searching for entities works properly with case-insensitive metadata. #1326
  * Invalid views now default to 'default' view. #1161.
  * Metadata cache now handles a 0 string. #1227
  * ElggPlugin get() now works with 0. #1286
  * Metadata __isset() now works for falsy values (except NULL). #1414
  * clear_plugin_setting() now only clears a single setting.
  * Submenu entries are correctly calculated after a simplecache refresh.

 API changes:
  * New plugin hook system:unit_test for adding files to unit tests.
  * $is_admin global deprecated; use elgg_set_ignore_access() instead.
  * Deprecated get_entities().  Use elgg_get_entities().
  * Deprecated get_entities_from_metadata().  Use elgg_get_entities_from_metadata().
  * Deprecated get_entities_from_relationship() and g_e_f_relationships_and_meta().  Use elgg_get_entities_from_relationship().
  * Deprecated get_entities_from_access_id(). Use elgg_get_entities_from_access_id().
  * Deprecated get_entities_from_annotations().  Use elgg_get_entities_from_annotations().
  * Reorganized directory file path to rely on GUID instead of username.
  * annotation_id column added to the river database table.
  * remove_from_river_by_annotation() added.
  * unregister_elgg_event_handler() and unregister_plugin_hook() added. #1465
  * clear_all_plugin_settings() added.
  * get_entity_relationships() supports inverse relationships. #1472.
  * can_write_to_container() can be overridden with the container_permissions_check hook. #1164 (part 2).
  * Deprecated search_for_*().
  * Deprecated search_list*().
  * Added elgg_deprecated_notice().
  * ElggEntity::countEntitiesFromRelationship() supports inverse relationships. #1325
  * delete_relationship() triggers the hook delete:relationship and passes the relationship object. #1213
  * added ElggEntity::removeRelationship(). #1376.
  * get_entity_dates() supports order by. #1406.
  * Added elgg_http_add_url_query_elements().
  * Added elgg_register_tag_metadata_name() and elgg_get_registered_tag_metadata_names();
  * Added ElggEntity::getTags().
  * Added elgg_add_action_tokens_to_url().

 Services API:
  * Separated user and api authenticate processing
  * hmac signature encoding now compatible with OAuth
  * New plugin hook api_key:use for keeping stats on key usage
  * New plugin hook rest:init so plugins can configure authentication modules
  * Moved auth.gettoken to POST for increased security
  * Fixed REST POST bug #1114
  * Fixed #881, #1214, #1215, #1216, #1217, #1218, #1219, #1220, #1298, #1364