Andy, found a minor bug. Well, I found it before but forgot about it, and it nipped me again today.
You reply to a post. While composing your reply, you decide to change the subject line (perhaps the thread has swerved from the original subject). You click preview and all is fine. But during your preview you spot an arror and go to edit it. The subject line changes back to the original one rather than your edited version.
If you don't catch it before you post, you end up posting with the original subject line rather than your new one, although if you start to type the new one in again and have AutoComplete enabled on MSIE, the new one you typed in before is in the dropdown list for retrieval, so it was accepted at one time, just didn't stay. :-/
~~~Krin