I could be wrong about this, because I haven't been able to duplicate the bug-- mostly because I have no means of doing so-- but I think there may be an error with posting and editing at the same time in the same thread. As in, someone posts a message, then begins to edit the message, then someone else starts a reply, finishes the reply, and then the first person finishes editing.
I say this because just now, Sameth posted, then I replied, and a couple of minutes later, my reply was gone but Sameth's original post had been edited to add a lot of stuff after the original text. So, the above is what I'm guessing happened.
If I'm wrong and it was something else, I apologize. Maybe I just misremembered and never actually clicked "Post" at all. I don't think so, but it could be.
Thanks for the boards and the forum in general, btw... I love discussing the various mysteries of TDF books with people here.