Capabilities:

* Remove all previous forums roles in bbp_set_user_role().
* Use direct array intersection instead of bbp_get_user_role().
* Fixes issue where users can have more than 1 forum role.
* See #1939.
Rewrites:

* Introduce unique rewrite tags and rules for user topics and replies.
* Fixes conflict with topic and reply post type rules.
* Fixes bug where user topics and replies pages were not working on some installations.
Pagination:

* Fix bug where topics started, favorites, and subscriptions pagination would link to the root of a users profile.\
* Fixes incorrect filters on topics and replies URL's.
Mentions:

* Add username @-mention filters.
* Automatically links to profiles when @username is used in a topic or reply content area.
Theme Compat:

* Introduce bbp_get_template_stack() and bbp_register_template_stack().
* Used to provide an accurate hierarchy to individual template locations.
* Also enables an unlimited number of parent/child template relationships to be registered.
* See #1968.
Template Tags:

* Check for edit when calling _is_ single forum/topic/reply.
* See #1968.
Theme Compat:

* Reverse the look-up of bbp_locate_template() and check $template_names first.
* When a template is located, break out of both loops.
* See #1968.
Theme Compat:

* Only iterate through bbp_get_template_stack() one time per call to bbp_locate_template().
* See #1968.
Theme Compat:

* Remove single- fallback from forum/topic/reply/topic-tag edit templates.
* See #1968.
Update Domain Path in bbpress.php to /languages/.
Capabilities:

* Remove advanced capabilities code, template part, and UI helpers.
* This has been replaced by the forums roles selection.
* See #1939.
Code Improvement:

* Revert part of r4258.
* Cast as int instead of using absint()
* Fixes regression that broke existing bbPress plugin (hierarchical replies.)
* Fixes #2008.
Breadcrumb:

* More flexible HTML output for breadcrumb.
* Adds ability to modify HTML before/after separator, current, and each crumb.
* Hat-tip netweb for inital patch.
* Fixes #2009.
Cleanup:

* Move a few files out of /core and into /common.
* Includes: widgets, shortcodes, classes.
* Update bbpress.php to use new paths.
Add some brackets to improve code readibility in update.php.
Capabilities:

* Introduce bbp_get_user_role_map() to more intelligently map !WordPress roles to bbPress roles.
* Use bbp_get_user_role_map() in bbp_set_current_user_default_role().
* See #1939.
* Fixes #2010.
Capabilities:

* Switch default value of global access to 1.
* Fixes confusion about why users are not automatically added to forums.
* See #1939.
Capabilities:

* Use bbp_get_default_role() in bbp_get_user_role_map().
* See #1939.
Capabilities:

* Add "Forum Role" column to single-site users list.
* Fixes issue where there was no immediate way to see what users had what forums role at a glance.
* Props jmdodd.
* Fixes #2012.
Capabilities:

* PHP5'ize list table BBP_Users_Admin methods.
* See #2012.