Board Thread:Support Requests - Getting Technical/@comment-1296374-20141209115157/@comment-1296374-20141209120600

I tried changing the extension to jpg and got a different error: "File extension ".jpg" does not match the detected MIME type of the file (image/png)." so that's not it. I also tried capitalizing the extension, but that didn't help. I'm trying to upload from Special:Upload.