I have been noticing this strange phenomenon on both my Tiger Macs Intel and PPC. Sometimes when I click the mouse, it will suddenly leap in a random direction so that my click lands somewhere else. REALLY annoying. But it's a non Apple Macally mouse. My Apple mouse never did this. I installed the Macally drivers nothing changed. It also hops a line up sometimes for no reason which invariably makes me click the wrong thing. But I don't like the one click Apple mouse nor the Mighty Mouse. So I'm not sure what to do. Should I be complaining to Macally? Thanx Richard