- Patch #564852 by justinrandell, mcarbone, Crell: fixed subselect in WHERE condition with multiple placeholders cause invalid/duplicate placeholders.

#633156 follow-up by effulgentsia and yched: Clean up AJAX tests, add sister function to drupal_js_encode().

#619666 by effulgentsia, casey, and catch: Changed Introduce new pattern for drupal_static() in performance-critical functions.

#547068 by sun, seutje, yoroy, Gábor Hojtsy, adrian, Bojhan, and markboulton: Use Seven theme for installation / updates.

#601806 by sun, effulgentsia, and Damien Tournoud: drupal_render() should not set default element properties that make no sense.

#620688 follow-up by chx and effulgentsia: Fixed drupal_static_reset() is broken, with expanded test coverage.

#179932 by Damien Tournoud, jromine, kenorb, deviantintegral, sun: Fixed Required radios/checkboxes are not validated.

- Patch #444228 by Tri, raulgigea, mikeytown2, JohnAlbin: optimize CSS option causes php cgi to segfault in pcre function 'match'.

- Patch #619902 by sun: performance improvement: dashboard, region and block building had unnecessary function calls.

- Patch #606640 by eojthebrave, sun, catch: don't use menu loaders because menu loaders are executed on every menu system access check. Performance improvement.

#560944 follow-up by brandonojc, seutje, and Davy Van Den Bremt: Move collapsible fieldset logic from theme_fieldset() hook to form_process_fieldset().