I noticed that under my dual monitor setup, if I choose to have the tip balloons appear at the top right of my monitor, they actually display at the the top left of my secondary monitor.
I'm running Awasu on my primary (left monitor) and in the windows video setup, my monitors are enumerated so that the left monitor is number one and the right monitor is number 2.
It's not the end of the world. I just moved the balloon to the top-left and that took care of it. Curiously enough, however, when the balloon was set to the default bottom-right corner, it did appear on the correct monitor.
edit: currently running Awasu personal edition, 2.0 under windows xp.