#995854 by rfay, effulgentsia, sun, merlinofchaos, Damien Tournoud, manimejia: Fixed #ajax doesn't work at all if a file element (or enctype => 'multipart/form-data')  is included in the form

#939962 by rwohleb, chx, quicksketch: Fixed File field allowed extensions JS broken in Chrome on OS X

- Patch #745590 by justinrandell, effulgentsia, yched, quicksketch, eojthebrave: #managed_file() element does not work when #extended not TRUE, or when ancestor element doesn't have #tree=TRUE.

- Patch #926016 by effulgentsia, chrisshattuck: several bugs when trying to remove files from a multivalued file/image field.

- Patch #882694 by mgifford, sun, ksenzee, bleen18, yched: add missing form element titles for accessibility.

- Patch #943112 by ksenzee: file_file_download() should delegate header checks to a separate function.

- Patch #561858 by effulgentsia, sun, rfay, Nick_vh, merlinofchaos, katbailey, dereine, tstoeckler: drupal_add_js() and drupal_add_css() to work for AJAX requests too by adding lazy-load to AJAX framework.

#913846 by Bevan, grendzy, bleen18, rfay, et al: Fixed Image/file field breaks after uploading two files.

- Patch #756762 by effulgentsia, fago, sun, rfay, pwolanin: AJAX should follow same rules for whether to call drupal_rebuild_form() as non-AJAX submissions.

#763376 follow-up by fago, sun, effulgentsia: Minor adjustments to drupal_array_set/get_nested_value().

#763376 by fago, sun, noahb, effulgentsia, ksenzee, jhodgdon: Fixed Not validated form values appear in ().

#846296 by Berdir, ridgerunner, agentrickard: Fixed file_file_download() only implements access checks for nodes and users.

- Patch #353458 by quicksketch, drewish, jpetso, sun, noahb, aaron, chx, mikey_p, dhthwy: hook_file_references() was not designed for a highly flexible field storage.

- Patch #736298 by effulgentsia, eojthebrave, andypost, robeano: fixed Refactor file.module to use proper button click detection, enabling FAPI to improve button click detection security.

- Patch #780154 by chx, noahb, dhthwy, pwolanin, aspilicious, jhodgdon, dereine, bjaspan: listing API for field API.

- Patch #645800 by katbailey, effulgentsia, rfay: ajax_deliver() ignores #ajax['method'] and incorrectly forces 'replaceWith' for simple AJAX callbacks, D6->D7 regression.

- Patch #671184 by Scott Reynolds, sun, effulgentsia, yched, rfay, Pasqualle: AJAX form can submit inappropriately to system/ajax after failed validation.

- Patch #684846 by effulgentsia, rfay, quicksketch, aspilicious: AJAX triggered by non-submit element fails if any elements are validated.

- Patch #652834 by yched, effulgentsia: changed Field formatters as render arrays to increase performance (and to clean-up the code).

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