Board Thread:General Discussion/@comment-4097117-20130314163452/@comment-1474707-20130314180139

OK then I guess the problem is your tags. Because they're not displaying on that page, and that page is not transcluded anywhere to make them appear, they are technically unused. Notice how the images you recently took out of the includeonly tag, like, has usage listed on the file page, but is still showing in unusedfiles (and will do until the cache updates)