Ever since moving over to the mac from the PC 4 years ago my biggest complaint is the mouse drivers/movement. I have used USB Overdrive and Steermouse with mild success. In that 4 years I have probably spent over $1000 trying to find the perfect mouse for me. Up until now never used the mouse supplied with the Mac. My current computer is a MacPro that came with a mighty mouse. Never used it. I just bought my son an iMac and he wanted to use one of my logitech mice so I took the magic mouse and started using it just to see. I was extremely impressed with the movement of the cursor and how smooth it was. The issue I have with it is now after about 30 min of using it I have a sharp pain in my wrist. So I need to go back to an ergonomic mouse. I am sitting here testing every mouse I have ever owned trying to figure out what will work for me. What I am starting to see though is the cursor movement is jumpy. And what I mean by that is if I move the magic mouse slowly in a straight line, the cursor stays straight. If I use any of the logitech or MS mice I have if I do the same thing, the cursor jumps 2-3 pixels up or down. Mice I have tested: Logitech MX610 MX Revolution MX1000 MX700 G5 G7 MX518 MouseMan Dual Sensor Razor Lachesis Razor Naga LX3 Intellimouse Explorer There are a couple more but can't find them. I do some work in photoshop but not enough to get a tablet and this is a massive pain when I am doing things in photoshop. Has anyone come across these issues and if so how did you over come them? Thanks!