The clicks are so sensitive, that it is registering 2 clicks when I press once. I close a bookmark folder, and it opens the folder that should be under the mouse pointer!

I cant write it any more clear, it processes two clicks as one! At first I didnt really mind, but I'm here now. It's having a drip drip effect, and when your working that can boil the blood! Even made me consider loading back up IE! And thats something!