I'm not sure that this is important, but it seems odd and so I though that I'd report it.
I have a contribution to this thread:
My contribution, fwiw, is the latest showing and is dated 09-02-13 (UK date format). The thread is showing up on the first page of 'recent' threads, among threads that are dated 'today 07:5x'. Today is 14-02-13 (UK date format, again), so something seems a bit odd.
The latest contributions to all of this thread and the ones immediately around it are all timed in the 07:5x range (but the others have the differing dates, obviously), which may or may not be relevant. None of the three contributions to the thread are showing up as having edits, which I could see would be something that make assigning a single date to a contribution less obvious.