The current sound for text messages in any window is DING DING

but when you have multiple chat tabs open they sometimes scroll off the right side of the screen. So far off, that the little yellow icon for the new message doesn't show.

It would be nice if the private text message sound was different from the main text chat window, this way if you don't see the yellow icon, you'll know there is a new private message somewhere off the screen.

Thanks