Release Notes: These changes were made since the 2.8 release. A bug was fixed in which the wrong files were deleted when the core update failed. Memory requirements in the Dashboard were improved. A problem was worked around in some third-party themes that tried to call get_categories() before the function was loaded. Extra security was put in place for some third-party plugins that don't do their own explicit permission checks. Various other minor bugfixes, tweaks, and improvements were made.