On wikis with the message wall extension enabled, there's an odd glitch in the recent changes page. When someone posts in a message wall, the recent changes page shows the thread title, but glitches up on the "{{USERNAME}}'s wall" part. It shows bare HTML code instead.
For example, just randomly got this from recent changes:
- (diff | hist) . . Harassment on <a href="Message Wall:Cheese pingu">Cheese pingu's wall</a>; 12:43 . . (+304) . . Cheese pingu (wall | contribs)
Anyone else having this problem? I encountered this on Google Chrome 35.0.1916.153. I haven't tested this on other browsers, but I might if nobody else is getting the problem.