#617588 by dww and yoroy: Drastically improve the UI for the landing page before you actually update your site.

#679890 follow-up by Bojhan, aspilicious, and agentrickard: Remove more extraneous 'Please' in the interface.

- Patch #502190 by jhodgdon, stella, sun: hook implementation headers out of compliance with standards.

- Patch #491214 by JohnAlbin, Gábor Hojtsy, eigentor: implement a more usable top level Appearance page. Yay.

- Patch #605918 by dww, JacobSingh: port update manager to use the new Archiver class, not directly Archive_Tar, and fixed usability problem with unwanted link showing up.

#600974 by effulgentsia, JohnAlbin, sun, and Damien Tournoud: Allow theme functions to take one argument without any hacks. NOTE: This is an API change in hook_theme().

#538660 by JacobSingh, dww, JoshuaRogers, adrian, Crell, chx, anarcat, and cwgordon7: Add a functioning Plugin Manager to core. Can you say module installation and updates through the UI? I knew you could! :D

- Patch #456088 by dww, JohnAlbin | Dave Reid, Gábor Hojtsy, pwolanin, tic2000, meba: sub-themes not notified of security updates for base themes.

#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.

#326539 by JohnAlbin, sun, cha0s, ultimateboy, Rob Loach, Damien Tournoud: Convert 'class' attribute to use an array, not a string.

- Patch #536440 by Gábor Hojtsy: the attached patch moves the Structure >> Themes section to the top level Appearance item as outlined in the D7UX IA.

- Patch #199774 by dww, ugerhard, brianV, John Morahan: make it more 'natural' to enable security notification e-mails.

- 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.

#220592 by dww and pwolanin: Update module now always uses the database for caching so that drupal.org project data persists and site performance (in both directions) is not horrifically mangled.

#431148 by pwolanin: Make it easier to visually distinguish between security updates and regular updates.

#350381 by tstoeckler and swentel: Add a note about running update.php to the modules page that's easier to find than the one buried under the module updates page.