My guess is that no one did anything to delete your posting. The dbforums database has been "collicky" lately, and postings disappear at random. Sometimes completely (the whole thing is gone), other times just partially (the text is AWOL, but the headers are still present).
My suggestion is that you repost. If someone intentionally deleted your posting, they'll probably delete it again and send you some kind of message. That seems rather unlikely though, you probably just got hit by the "message troll" and he made a snack of your posting!