User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-24258073-20150521204706/@comment-5558012-20150522022436

This is the result of Wikia changing some h1 headers to h2 headers in the right rail (as stated here). To fix the problem you need to go to your MediaWiki:Wikia.css and change h1 to h2 for .HotSpotsModule and .ChatModule (where you create the border and where you add the background image so you are making four changes total).