Fails utterly on 10.3.3. Seizes all input and, as far as I can tell, locks up the WindowServer. Only recourse found is to force-reboot or ssh in and kill the WindowServer process. It has a brief dialog, which is entirely in German, which says it "needs 10.2" and that pressing "escape" should switch out of it. It doesn't. Pressing escape gives me a system beep and no more. Don't run this program on Panther unless you intend to lock up your comp.