Okay, well, dust collects in the mighty mouse from time to time and messes up the scrolling, and that requires the occasional cleaning. That's fine. But today, out of the blue, my middle-click just stopped working PERIOD. Instead of bringing up Expose like it normally did, it acts as a right-click. This is a big problem for me, since I'm very dependant on Expose. Everything in the mouse's settings is fine. Can anyone help me out?