This patch fixes: http://bugzilla.gnome.org/show_bug.cgi?id=519188 It is already being applied in opensuse, fedora and mandriva and has been accepted by upstream Reproducible: Always
Created attachment 157621 [details, diff] metacity-bgo519188-window-overlaps-itself.diff
I think I'm in favor of including this, but don't have time to test this right now, so just touching up the summaries and URL for now :)
This is supposed to be handled in 2.24 which is going (finally) stable these days so I don't thinkg 2.22 will get this. Thanks for reporting anyway.