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.

Issue #1376166 by sun: Fixed Custom logo and favicon functionality inanely tries to support absolute local file paths.

- Patch #1250800 by attiks, Jelle_S, dereine, xjm: language domain should work regardless of ports or protocols.

- Patch #540294 by Gábor Hojtsy, clemens.tolboom, Xano: node language settings from Locale to Node module.

Issue #1221276 by fietserwin, Gábor Hojtsy, sun, gumanist: Fixed locale_get_plural() only works for a single language within a request and does not work for English.

Issue #1294264 by budda, davidwhthomas: FieldUpdateForbiddenException: Cannot update a list field - better debug info.