for the ajax thing, it's kinda tricky... the quick-reply have to be interacting with the Edit ajax of the last post if you are the author of that one, so if you post from the quick-reply, it will be connected to the EDIT of the last post you've made instead of posting a new one with the quick-reply ajax...

the problem with that situation, or at least the logic behind a problem, is that if someone else posts when you use the quick-reply, your post will be merged with your last post, even if someone posted between the two... logic applyed tell that it's not a problem, because if you use the quick-reply, you don't know if someone else reply afterward, so you don't actually reply to that last one...

someone is lost here?!