I've had my iMac for almost a year now. It came with the wired Mighty Mouse, and now it's not working. I am back to using the mouse from my old PC. I,looked into the settings for the mouse in system preferences, and it seems that whatever the middle button(button under scroll wheel) is set to is what every button does, no matter what each individual button is set on. So if the middle button is set to Primary, everything button will be primary, etc . . . Is there anyway I can reset the mouse, or reinstall the drivers for it, or something? This is driving me CRAZY! By the way, I'm on Mac OS X 10.5.4 . . .