Touchpad and Magic Mouse become super sensitive ...

Ocassionally, my Touchpad and Magic Mouse become super sensitive and start selecting everything I roll over, grabbing windows, deleting items, email and other things without my clicking anything ... they cause the window to freeze until I turn them off and pull out their batteries. Usually I need to turn the computer off and leave it to think about how it's behaving for a few minutes ... then turn it back on and it works ok ...

Not sure why it's acting up, but it happens with both the Touchpad and Magic Mouse ...

Thanks