Yes it is just in the same thread, but it's still bloody annoying. At least I know why it's doing it now. Cheers Cleavers.It should only happen if you go back to the same thread ? If you go to a different thread it shouldn't be there. Is this how its working for you both ?
The forum software actually saves a draft message, which is useful if you have to go away for a few minutes without completing it. Once you do reply to that thread the reply box should become empty again.