Makes no sense. The redirect URL is somehow getting set to blahblah?t={pollid}. The pollid is 3184. The threadid is 361680. There's nothing strange about that poll as far as I can tell, and if something were broken in the php, all polls should be redirecting to the wrong threads.
(t=x is supposed to mean x is a threadid. p=x is supposed to mean x is a postid.)
A quick check of the php shows nothing strange (not that there should be, there are very few php code changes because they're tough to maintain across upgrades), and the url looks like it gets set properly to t={threadid}, not t={pollid}.
I'll keep an eye out, but right now I'm lumping this in with crop circles and ball lightning.