Okay so I'm very new to the handheld/mobile world. I use the icon to get to the last message, but when I get to the end of that post (could be multi-page), I can't get back to the thread or the previous post without going all the way back to the menu and working my way back to the particular thread ... what am I missing?

Also its nice that there is a "next page" option, but a previous page would be better, especially given the fact that you jump to the end of the thread to read the last post then realize you haven't seen the one before that, etc.