Why not just upload the correct one to [[got:File:Wiki.png]]. No dev intervention needed.

Also, http://got.wikipedia.org/wiki/File:Wikipedia-logo.png doesn't have a correct alpha channel.

becareful_icanseeyourfuture wrote:

Hello, I am sorry to disturb you this way, but is isn't working somehow. When I want to change the file by uploading a new version, it tells me, it doesn't work, because of the same name.

Hmm, did you try checking the "Ignore any warnings" button on the upload form?

becareful_icanseeyourfuture wrote:

Okay, now it finally works. I really thank you!

Glad to help.