I have done a clean Natty install having bought a new SSD and find that in applications (ahem) such as Minecraft, and in the default web browser Firefox, the mouse scrolls too far .
So for example in Minecraft the mouse wheel jumps multiple items rather than one with each mouse wheel roll. With Firefox the page leaps quite a distance with each mouse wheel roll.
Any ideas where I might adjust this?
As a workaround, try unplugging your mouse and plugging it back in. I run into this issue when the mouse is plugged into my laptop when Ubuntu boots up. Using this workaround fixes the issue for me.
I found this project which aims to fix this problem, without having to unplug and replug the hardware: http://sourceforge.net/projects/resetmsmice
The project provides packages for Debian and RPM