Board Thread:Support Requests - Designing Your Wikia/@comment-26569191-20150428041517/@comment-26316686-20150502234515

Alright if you want it to look unstretched find that banner on your computer and resize it to a height of 409 pixels (that is 320 * 320/250). Then upload that image as your new hero image, this will resize it to a height of 250 pixels and be compressed, then our CSS code will stretch/uncompress that to 320 pixels and it should look normal again :)