I just had an idea. I sometimes get into long personal chats with people. And when I hit update chat, it takes a while to load up the entire conversation when I only really want to see my last few words so I can remember what the other person was responding to.

I was just thinking if it took several presses of the update chat button to get an exceptionally long conversation in its entirety, then it would make it quicker and save some server look ups.

seconded - you can have two buttons - 'view last turn' 'view all chat'

also, you should make the view older chat button unclickable when there isnt any more unread chat, rather than making that little box pop up.