Seconded, the Mac acceleration curve is terrible. Strangely on some installations it doesn't seem to come into effect. For example, I have never noticed it on

Seconded, the Mac acceleration curve is terrible. Strangely on some installations it doesn't seem to come into effect. For example, I have never noticed it on a MacBook using the touchpad. And I could have sworn it was not there when I first installed Snow Leopard. But right after installing Lion I had to spend the first few hours hunting down utilities to get the mouse back into a usable state...