I think it's time to return this mouse, one other thing I don't like about it is the amount of pressure it takes to depress the wheel to pan (I have an indention in the bottom on my finger), and it doesn't work quite right either. I think I'll look at Logitech and anything else besides Microsoft. Now I know better what I want in a mouse by finding out what I don't like. In the meantime, I'll see what I can find for legacy drivers. Thanks!
J.D.