#303987 by CitizenKane, jhodgdon, rdrh555: improve documentation of url() and l(), so usage of different path types and arguments is more clear

#276876 by mr.baileys, rdrh555: document that we suggest to use lowercase names with the variable_*() API due to database backend behaviors

#845672 follow up to #360605 by Damien Tournoud, Berdir, Dave Reid: previous (unreleased) fix inadvertantly turned on E_DEPRECATED on machines where it was off

#444228 by raulgigea, donquixote, Tri, mikeytown2, JohnAlbin, dicreat, ridgerunner, casey, jonne_jvl: Optimize CSS option causes PHP CGI to segfault in PCRE function 'match' under certain conditions

#828706 by oadaeh: use module_load_install() instead of module_load_include() in drupal_get_schema_unprocessed()

#521370 by Damien Tournoud, marcingy, andypost: watchdog hook invocations should be ordered by weight, not name

#345591 by JacobSingh, pwolanin, c960657: add additional return data of protocol and status_messaga at all times, not just on error in drupal_http_request()

#458704 by markus_petrux, tic2000, Damien Tournoud: only remove the www. prefix from autodetected cookie domains, not custom set cookie domains

#265973 by clemens.tolboom, Damien Tournoud, Uccio, dixon_, mr.baileys: make Drupal capable of handling bigger XML-RPC messages by removing some unnecessary processing

#340557 by Dave Cohen, Dave Reid, dropcube, smk-ka: speed up drupal_is_front_page() by caching its value instead of computing each time

#360023 by greggles, rszrama, stella, sun, andypost: add missing comment publish action and clean up some code documentation

#256001 by bjaspan, stormsweeper, Darren Oh: pgsql driver does not handle unsigned numeric fields properly

#566390 by Gábor Hojtsy, seutje, Jose Reyero: Apply locale import protection user setting to plural forms the same way we apply to other parts of the .po file

#265719 by kkaefer, JacobSingh, ksenzee, pivica: fix path mangling in CSS aggregation code to be sure to generate IE compatible CSS

#43462 by leafish_dylan, c960657, andypost: simplify and fix compatibility of compression code in page caching

#796048 by jbafford: if JS files are concatenated with a one line comment and a multiline comment, that can lead up to JS parse issues

#306611 by joshk, jbomb, sun, dereine, andypost: avoid calling nonexistent action callbacks (eg. when a module is disabled); also backport some documentation improvements

#523058 by catch, sun, c960657, smk-ka, pwolanin, andypost: optimize calls to check_plain() by trying to use new PHP 5 features and inlining UTF-8 checking

#320171 by Deve Reid, jbrauer: fix return value passing by reference in bootstrap.inc's IP address checking

#732064 follow up by pwolanin: move lock system loading earlier to avoid stepping over it or attempting to use it before it is loaded