Issue #720876 by pillarsdotnet: user_register_validate() should invoke user_module_invoke() with an account object rather than an array; improved PHP 5.3 compatibility

Issue #269877 by neochief, roderik, akaliel, mathieu, jct, Jo Wouters, fago, ufku, fmjrey, nonsie, pfournier: avoid duplicate paths (again) in path_set_alias()

Issue #147000 by Berdir, Dave Reid, pwolanin, pillarsdotnet, TR, jbrauer, dstol: rework module_rebuild_cache() and system_theme_data() to support locking, so that concurrent requests will not corrupt the data; fixes an issue where themes got disabled occasionally

Issue #156582 by c960657, drico, pwolanin, townxelliot, Damien Tournoud, kbahey, mikeytown2, jpmckinney, craig_, zyxware: add missing timeout support to drupal_http_request() to avoid Drupal hanging on web service requests

Issue #556842 by mh86, catch, bangpound, wojtha, deviantintegral: optimize taxonomy_get_tree() by building the tree internally instead of recursively to improve performance; especially good for bigger taxonomies

Issue #504506 by andypost, pillarsdotnet, podarok: Drupal.formatPlural() did not pass on extra arguments for translations of some plural values

Issue #1173012 by carlos8f, Fabianx, Gábor Hojtsy: do not remove blocks for disabled modules in _block_rehash() to avoid blocks disappearing for people following the update guide to the letter disabling contrib modules when updating Drupal core

Issue #883038 by pillarsdotnet, ShutterFreak, anarcat: ereg() and ereg_replace() are deprecated but Drupal 6 will not migrate to preg to avoid breaking APIs, so we need to silence the warnings coming out of the use of ereg on PHP 5.3+

Issue #1174496 by Eric_A, grendzy, greg.1.anderson, c31ck: drupal_error_handler() should not assume filter_xss() is available. It might be called before that is loaded. Also fixes Drush compatibility.

Issue #825972 by daniels220, Reidsy, Albert Volkman: add phpdoc documentation to sess_read() and sess_write()

Issue #1260932 by DjebbZ, pwolanin: hook_nodeapi() optional arguments should not be made required by some core modules either

Issue #208793 by Damien Tournoud, kbahey, TR: instead of hardcoding the HTTP protocol version in responses, respond with the HTTP protocol version requested (or fall back to HTTP/1.0 if the requested protocol/version is unknown)

Issue #971812 by mfb, twistor: aggregator ignores Atom id element, which is equivalent to RSS guid element

Issue #845542 by pounard: db_query_temporary() will fail without CREATE TEMPORARY TABLES permission on MySQL, update install documentation for that

Issue #1225364 by sivaji, ñull: body field label is configurable but hardcoded in min word count validation error message

Issue #1103310 by c960657: lock_acquire() does not properly extend expired lock due to misuse of db_query() to check for affected rows

Issue #1006938 by dww, westwesterson: avoid PHP warnings in the PHP 4 XML parser caused by the relatively new XML data pieces produced at updates.drupal.org

Issue #480082 by pp: add previously undocumented variables in system_send_email_action_form()'s message field description

Issue #1173012 by carlos8f, Fabianx: fix poll_block() to not wrap the block list operation in permission checks which could result in block placement and configuration lost when block rehashing is run with a user lacking permissions to view content

Issue #1283442 by Ben Coleman, twistor, ggevalt: aggregator_block()'s permission check on the list, configure and save operations could result in loss of aggregator blocks when block rehasing is invoked with a user who has no access to feeds; permissions should only be checked on the view op

Issue #1169034 by mfb: fix notice in file_create_filename() for cases when the ext variable did not exist previously

Issue #1196102 by James_Stallings, noisetteprod: improve phpdoc on taxonomy_check_vocabulary_hierarchy()

Issue #1098556 by barbi, rocket_nova, kiamlaluno: search_box() documentation referred to theme_search_box_form() which is in fact implemented in search-block-form.tpl.php in Drupal 6

Issue #1192178 by pillarsdotnet, jhodgdon: fix user_module_invoke() argument names to make more sense and phpdoc to document them (no behavioral change of course)

Issue #1222802 by franz, droplet, jhodgdon: cleanup for pager phpdoc blocks; add missing text argument doc to theme_pager_link

Issue #1190846 by vitalsouto, ninizik: remove one of two copies of repeated phpdoc documentation on actions

- Patch #300714 by j0hn-smith, alexjarvis, lilou, linuxbox: sort node revisions by vid not timestamp.

Issue #1149628 by Ben Coleman: fix blog module query to include all ORDER BY fields in select for PostgreSQL compatibility

Issue #925580 by tbenice, rsevero, marcp: dix upload modules's form altering to be clearly compatible with PHP 5.3

Issue #188947 by lyricnz: date_validate() takes a form element, not a whole form, correct the variable name to clean this up

Issue #1154722 by mattconnolly, barbi, jhodgdon: link Form API reference to Drupal 6 version in Form API docs