For some thumbnails I now get a 404. Not sure that if is related to
the update or changes to the 404 handler?
I.e. if you look at
http://test2.wikipedia.org/wiki/User:JanGerber/commonstest all
thumbnails currently return an error.
Files that previously had issues, i.e.
http://test2.wikipedia.org/wiki/File:Citygroup_Center,_San_Francisco.ogv
now look great.