Issue 1815682 by Nicolas Bouteille and h3rj4n: Display blocks on localized taxonomy term page doesn't work Issue 2058959 by marleythedog: removing an incorrectly committed debugging statement Issue 2058959 by marleythedog: Context cache not invalidated if 'destination' set on edit form Issue 1872054 by zterry: block rendered by context without implementing hook_block_list_alter. Issue 1688330 by JamesSharpe: Reduce number of calls to system_region_list Issue 863298 by joelcollinsdc: Performance: Don't load/build unnecessary blocks, ensured that only blocks in active themes are subjected to block view calls