I've had scrolling problems with my two Apple Mighty Mice, too. The second was just bought for this reason. Then I saw someone explaining how to fix this. And i

I've had scrolling problems with my two Apple Mighty Mice, too. The second was just bought for this reason. Then I saw someone explaining how to fix this. And it definitely works. Place a sheet of paper on your desk, and rub the poor mouse's scroll ball rigorously on the paper in all directions. After that you'll get the feeling of a brand new one.