Curswine was the first to discover this, so if youve got a shirt in the gallery that you posted up twice, or made on a bad day, then this will help
"Just discovered a couple of things, first, when naming your upload on here, don't use diacritics of any sort e.g. ä,é,č,ň stuff like that or you'll just be given a 404 error.
Secondly, you can edit/delete stuff you have uploaded, just try and do it as usual until you're taken to the 404 screen, then in the address bar delete the first
www.footba... bit up to where it starts again, then hit enter and you'll be allowed to edit or delete.
Bit of a long way around but it works. "