So I just purchased profile background but the site won't let me upload a Miranda Kerr picture like it says "Cannot find the page you were looking for..." so please help me out here this is probably a bug please fix it.
You need to make sure any profile background you're trying to upload is under 500kb. Just compress it if it's too big. http://compressnow.com/Besides that just make sure you're clearing your cache just like you would do with an avi to see your updated backgrounds.
