I dropped my mighty mouse the other day, and after inspecting it, I noticed that it has a kind of jiggle. Like you can wiggle the bottom part araound a bit, and if you click it slowly, it will depress a bit (and make a noise) before it clicks. I don't know if this is normal, and I just noticed it after inspecting the mouse, or if it's a problem caused by dropping it. Any help? Thanks.