- Patch #347959 by sun, Damien Tournoud, justinrandell, scor, chx: modules_installed() was broken during testing.

#674784 by JohnAlbin, naxoc, et al: Fixed theme_get_suggestions() fails to return 'page__front()' suggestion on front page.

- Patch #325169 by mundanity, Arancaytar, Crell, chx, picco, alexw: move error/exception handler higher up in the bootstrap process.

#678714 by effulgentsia: Unify use of theme hook / template suggestions, fix clobbering problems, and improve suggestion discovery performance.

#299308 by redndahead, Dave Reid, dropcube, catch, redndahead, and dbabbage: Add POD to installation requirements.

#646874 by sun and David_Rothstein: Remove assumptions about Contextual links and Shortcut modules from template files.

- Patch #601548 by Damien Tournoud, moshe weitzman: loosen the dependency between t() and the theming layer.

#610234 by Gábor Hojtsy, ksenzee, cwgordon7, David_Rothstein, seutje, marcvangend, sun, JoshuaRogers, markus_petrux, Bojhan, Rob Loach, Everett Zufelt, drifter, markboulton, leisareichelt, et al: Added Overlay module to core, which shows administrative pages in a JS overlay, retaining context on the front-end site.

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

- Patch #623992 by catch: performance improvement: reduce {system} database hits on every page request.

#552478 by pwolanin, samj, dropcube, and sun: Improve link/header API and support on node/comment pages rel=canonical and rel=shortlink standards.

#602522 by effulgentsia, sun, and moshe weitzman: Make links in renderable arrays and forms (e.g. 'Operations') alterable.

#192056 by effulgentsia, Dave Cohen, andypost, hswong3i, geodaniel, pwolanin, and dahacouk: Ensure user's raw login name is never output directly.

#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().