User blog comment:Godisme/Fair Use and Image Licensing/@comment-1474707-20111104195757/@comment-1393830-20111104201635

They are not necessarily voided, you just need to license them a little different. Since it is meant to be a link, you need to specify that its intended purpose is a graphical link. Since the licensing can still be seen if you visit the file page (even though clicking the image does not take you to the file page). Backgrounds can still be licensed like this for the most part, since background are usually just one image or a few joined together, you list where each of those came from, attributing it to where they were found. You can place the tags yourself on the page at File:Wiki-Background. Now wordmarks are the trickier thing. Since they are usually partially a copyrighted work and partially the uploader's (the wiki part that most add). To play it safe, I would say use the proper fair use on it anyway, attributing it to the owner of the logo it is based off of. It couldn't hurt.