User blog comment:Rappy 4187/Technical Update: October 30, 2012/@comment-188432-20121031144941

Yeah, something has definitely happened to the  selector. It's no longer responding to  commands in the way it should. See any article at tardis, such as tardis:42 (TV story). Kuopiofi reported below that it had to with pages with infoboxes, but it's not. It's the TOC itself that is the problem, as evidenced by tardis:Neil Penswick.