User blog comment:DaNASCAT/Technical Update: November 27, 2012/@comment-4616791-20121128234155/@comment-3441771-20121129045018

Good grief! Why do these tags keep being mucked up?! We're told to use them, and new wikis now have 'em standard...

Wikia, just keep z-index of the ad at a consistent level or alter the the z-index of the column at the same time. :-/