Issue #404302 by KrisBulman, kathyh, JamesAn, droplet, sun: Fixed Improve tabledrag grippie CSS (and fix an IE7 alignment issue).

Issue #1425330 by swentel, grendzy, davereid, wojtha, c960657: Fixed Apply Aggregator and OpenID fixes from DRUPAL-SA-CORE-2012-001.

Revert "Issue #1425330 by swentel, grendzy, davereid, wojtha, c960657: Fixed Apply Aggregator and OpenID fixes from DRUPAL-SA-CORE-2012-001."

This reverts commit c3fa160d.

Issue #1425330 by swentel, grendzy, davereid, wojtha, c960657: Fixed Apply Aggregator and OpenID fixes from DRUPAL-SA-CORE-2012-001.

Issue #1446372 by Heine, bserem, champlin: Fixed Invalid Unicode code range in PREG_CLASS_UNICODE_WORD_BOUNDARY fails with PCRE 8.30.

Issue #218004 by Dave Reid, heyrocker, pcambra, neclimdul et al: Fixed Allow aggregator feed URLs longer than 255 characters.

Issue #1430300 by mradcliffe, effulgentsia: Fixed Preprocess functions in an include file fail to get called when the theme implements a suggestion override.

Issue #967166 by effulgentsia, Cottser: Fixed Content rendered via AJAX does not respect stylesheets removed in .info files.

Issue #1065626 by Heine, droplet, xjm: Fixed Machine name not editable if every character is replaced.

Issue #687180 by Island Usurper, catch, Berdir, Damien Tournoud, xjm: Fixed Deleting a taxonomy vocabulary leaves term reference fields still pointing to it, and a PDO Exception when creating content.

- Patch #673020 by Zoltán Balogh, Gábor Hojtsy, good_man, kalman.hosszu: tests for adding the Content-Language HTTP header to the generated page.

- Patch #1410096 by fastangel, Gábor Hojtsy, kalman.hosszu: convert comment language code schema to langcode.

- Patch #1416392 by Gábor Hojtsy, plach, rvilar: clean up language (types) bootstrap function naming and documentation.

Issue #655048 by Gábor Hojtsy, intuited: Fixed Plural formula information blanked when importing a poorly-formed .po file.

Issue #1313300 by jwilson3, rjgoldsborough, MrHaroldA: Fixed Wrong uri in 'Add new comment' teaser link if set to COMMENT_FORM_BELOW.

Issue #652288 by Niklas Fiekas: Rewording the 'proceed with the installation' text on the installer's requirements page.

Issue #1401496 by bleen18: Fixed forum_taxonomy_term_delete() completely broken (takes  instead of  entity).

Issue #1267918 by Niklas Fiekas, darrellulm: Fixed User signature does not appear in comment preview.

Issue #1373312 by sun: Assign system_main() block to 'content' region and help block to 'help' region by default.

- Patch #1427098 by chris.leversuch: EntityFieldQuery::execute documentation - return value example doesn't work if query result is empty.