the "recent unread messages" warning window is too much aggressive
The pop-up window which asks if you really want to close a window with recent messages is too much aggressive. I can think of a few usage cases in which it fails, but at least it should not display the warning when I get new messages, open the window by clicking the user in the roster and then close it before other messages are received. The other major case IIRC is when the window is already open but not focused. even if no new messages are received between the time it gets the focus and I close it, I still get the warning. I was used to PSI which allowed closing quickly the window in these situations, and now I get a warning almost every time. Maybe you should just lift the algorithm from PSI.