Just noting that it happened again with darth_ender's Mormon Q&A thread. So far it has happened only with Warbler and darth_ender's threads and as far as I have noticed, only with threads in Off Topic (but I spend 90% of my time at OT.com in the Off Topic section, so that doesn't mean much).
EDIT: It also just happened twice for the following thread:
http://originaltrilogy.com/forum/topic.cfm/Random-demolished-movie-theatre-thread/topic/16410/