I searched all over for answers on my magic mouse hypersensitive issues (hyper motion sensitivity in adobe programs, trouble double clicking and text selection, uncontrollable zooming in adobe programs, etc), but everybody here has the same problem. Changed all possible settings on preference settings, even went back to my wired mighty mouse, it's the same craziness with the sensitivity. I was about to reinstall Mountain Lion and that's when my IT friend suggested to replace it with another bluetooth mice. Did as much research on Logitech and Microsoft mice and found one non-touch Microsoft Sculpt Comfort mouse and voila all the sensitivities are perfect the minuted it connected. Settings were easy and simple to setup. Even the mighty mouse doesn't have this perfect setup. Why can't Apple make something like this? Just wish it wasn't black, oh well, my nightmare with the possessed magic mouse is over!