Imported from: http://groups.google.com/group/in-portal-bugs/browse_thread/thread/e277901c41c1ff52#
There was some changes in Memcached server 1.4.5, resulting 2nd optional parameter of "delete" function called "$expiration" became required. That parameter is however not required based on it's documentation on www.php.netwebsite. Because of that we can't delete keys we can get some outdated cached data as a result.
Way we process memcached servers doesn't correctly process case, when connection should be made using unix sockets.
memcache_unix_socket_support.patch
memcache_delete_doesnt_work_on_latest_version_of_memcache.patch
Related Tasks
INP-712 - Getting issue details... STATUS