It is very tedious navigating thread pages that have a lot of replies. I propose that there ought to be TOP and BOTTOM navigation aids to assist in moving around the thread. There may be other navigational aids that would be nice... but having those two would make a big difference to usability, I know that sometimes I get notifications about a thread I am replying to... and I can't necessarily remember the conversation, for example. I want to go to the top of the thread, but there is just no easy way to do that. And of course... if there is, I guess I didn't see it...