PRAISE THE LORD!!!
My suggestion is that someone should make it available to change the title of our threads. Why can we change and edit everything else, but not that? It's fine and dandy until you have a thread title you want to change, then you're out of luck. This might be the one time when you typed fast and hit post without even looking it over, then before you know it you can't change a thing. It might even be as simple as somebody deciding that they have decided on a better name for the post. (you never know) So, how's that for a suggestion!?!
That is up to the makers of the software which we use for the forums. If you can't find a way to do so, then it is in their hands in the form of possibly an update. But I'm not sure if they would do that based on how their forum software works ... (*ie the title of the thread is the name of the page in the URL*)