I noticed that when I use /xssfull with a time delay (in SS3), the chatwindow is disabled and I can't maximize/minimize the window. Kinda pointless to have a delay if I can't change it. For example, I wanted to send a screenshot of my desktop, and the window wouldn't let me minimize it.
After a while I found that WinKey+D was a workaround, but it still bugged me a little. Could you get around disabling the window? It also stops me from sending a screenshot of the Activities and Games menus.
Oh, but remember that if you don't disable the window, the user could close it before the timer runs out, and you'll have to find a way to deal with that
[edit]It happens with /xssactive too[/edit]