Forum:Background image doesn't match MIME type

Uh, I want to put a 1600px optimized background image in the background of my Wiki, but it says "File extension does not match MIME type". I do not get this because it is a png image, I did not change the type, I tried with a few other optimizers, but nothing works...help? Here's a thumb, it exceeds 150 KB so that's why I try to optimize. ->

I'm Titanollante... Roar to me and I'll roar back. 01:46, May 22, 2012 (UTC)

Well, the obvious option would be to convert the image as a jpg and try that. If that doesn't work, try deleting the file and reupload it. Now, if that doesn't even work, you can always circumvent the ThemeDesigner via CSS. — subtank  ( 7alk ) 02:00, May 22, 2012 (UTC)