Well, if you had titled this thread with something like "Where'd my thread go?" or somthing like that, we moderators would have noticed it sooner.
Secondly, it would really help if you gave us a hint as to what the title of the disappearing thread was. It's hard to look when you don't know what you're looking for.
Lastly, you might check in the Lounge or other forums if the topic wasn't appropriate for the Pre-Allopathic forum.
Hope that helps. If not, PM me or email me. The email will probably be the best way to catch me. 🙂