User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-25580537-20150520155511/@comment-126761-20150520160054

As mentioned below, there is a known bug that is causing some text on Walls, Forums and Blog posts to appear larger than intended. The font size tweaks on Desktop XL are intended to be more subtle than is currently appearing in some areas. We're working on a fix.