- Patch #572618 by effulgentsia, pwolanin, sun: all theme functions should take a single argument. Code clean-up and performance improvement. Woot.

- Patch #557542 by CorniI, catch, fago, Crell, sun | pwolanin, chx, webchick, mattyoung, alexanderpas, justinrandell, dropcube, moshe weitzman, Damien Tournoud, Rob Loach, Dries: cache module_implements() for better performance and scalability.

- Patch #570572 by winston, David_Rothstein | Shai, Xano, alexanderpas, emmajane, kazar: changed label for user/1 account from 'administrator' to 'site maintenance account'.

- Patch #460320 by catch, fago, Frando: standardized, pluggable entity loading for nodes, users, taxonomies, files and comments.

#497118 by chx, catch, pwolanin, JoshuaRogers, and Jacob Singh: Remove the function registry. While the hope was that this would result in improved performance for low-end hosts, it comes at the expense of critical development experience problems and less benefit than something like APC. Class registry remains intact to facilitate autoloading.

Of all the patches to accidentally commit without a message. :( Rolling back registry rip. Let's try that again.

#554754 by gordon and dww: Added a new function update_get_update_list() to return list of pending updates.

- Patch #545356 by Damien Tournoud: sidebars were broken in install.php, update.php, and the expert profile due to a previous patch that made the sidebar regions more semantic for RTL support.

- Patch #233091 by dww, anarcat, gordon: restructured update.php to start making it possible to update Drupal sites from the shell.

- Patch #334283 by Damien Tournoud, andypost, Freso et al: add context to t() to help deal with ambigious strings (and improved the locale APIs a bit). Example: May is both a short month name as a long month name in English, but not necessarily in other languages.

- Patch #428744 by Gabor: make the main page content a real block and clean up some of the content API.

- Patch #430342 by kkaefer et al: usability improvement: changed 'site maintenance' to 'maintenance mode'.

#304163 by chx: Allow update.php to re-generate settings.php. Now possible to upgrade Drupal 6 to Drupal 7. Oh, yeah.

#330983 follow-up by David Rothenstein: Move rename function later in the process to un-break D6->D7 upgrade path.

#330983 by recidive and boombatower: Rename users/users_roles tables to user/user_role for consistency.

#363013 by mannkind: Use getwd() rather than realpath(__FILE__) to determine drupal root, so we don't break symlinks.

- Patch #201122 by c960657, Moshe Weitzman: never write anonymous sessions, unless something has been written to . This is an important performance improvements -- as long as you use modules that use  carefully. It might be good to report some analytics about this in the performance settings page so administrators can see if there is a 'broken' module.

- Patch #333143 by justinrandell: cleaning up the Drupal bootstrap code, removing bootstrap flag in system table.