Happened again with this thread: http://originaltrilogy.com/forum/topic.cfm/The-thread-where-we-make-enemies-out-of-friends-aka-the-abortion-debate-thread/topic/13620/post/692545/#TopicPost692545
This has happened with two of darth_ender's threads, two of Warbler's threads (twice on one of them), and twice on another thread by Beatleboy99. I can't figure out any consistent pattern though. :(