Errors (with patch)

As reported by @dreamermates , in this unresolved thread , errors are thrown from the filterVersions method in lib/Garbagecollector.class.php . This line: preg_match_all('#^(?P<group>.+)-(?P<token>[^\-\.]+).css$#sU', $file, $m, PREG_SET_ORDER); is using the wrong function. It should be this (note the pattern is also fixed): preg_match('#^(?P<group>.+)-(?P<token>[^-.]+)\.css$#sU', $file, $m); This causes lots of Undefined array key “group” warnings but mainly fails to do its task.