I have the mx1100 and when i scroll it is weird. It's jittery or something. I try to scroll down and it goes down, but then up a little bit. It's REALLY bad when I use it with Safari or FireFox. I can't seem to find a fix online anywhere.
Same thing here, driving me nuts. Love the mouse...ergonimically a good fit for my big hands, but this scrolling thing is the pits. Have reduced scrolling speed to the minimum in the latest driver and still having the issue. It's even worse when you click over into 'freewheel' scrolling mode, or whatever it's called.