#307636 by zbricoleur, sreynen, quicksketch: fix file identification bug with image file processing on Microsoft IIS

#212130 by salvis, boydjd, Steven, grendzy, Damien Tournoud: more complete support for unicode entities, to account for previously missing entities in decode_entities()

#772678 by sun, jpmckinney, Berdir, markus_petrux: no way to specify default collation, entirely depended on database configuration (which might be inappropriate)

#287647 by bjaspan, lilou, mikejoconnor, cafuego, Déja: cast invalid hook_schema() results into arrays at all times

#147000 by pwolanin, mikeytown2, et. al.: avoid multiple, parallel rebuildings of module and theme data

#829968 by AlexisWilke, andypost: fix drupal_lookup_path() to always return FALSE if the source was not found, not just for the 2nd call onwards

#716348 by grendzy, hefox: document that drupal_get_path(), drupal_load() and drupal_get_filename() can be used with 'profile' as well

#280930 by pillarsdotnet, oadaeh, David_Rothstein: fall back on an empty array if hook_schema is not defined for a module

#860154 by Zoltán Balogh, zserno: locale module import code state machine inconsistency ends up in ignored plural string variants

#767512 by jhedstrom, Damien Tournoud, marvil07: make drupal_unpack() and user_save() more robust to avoid issues with empty keys in the data array

#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