I now get this error for this SVG after purging the cache. We've just upgraded to Ubuntu 2014.04.
Same on https://translatewiki.net/wiki/File:Waymarked_Trails_logo.svg?uselang=en and others on twn after purging the cache by reupload. This was a [[mw:svgo]] optimised version, but using conservative settings doesn't help and even the old version fails, while it didn't before reuploading (and it still does if I revert and delete the new version).
Version: 1.24rc
Severity: normal
URL: https://translatewiki.net/wiki/File:Firefox-logo.svg