When I install Marble Mouse on a Thinkpad T410, it doesn't work. It gives me scroll functionality when I hold down the middle button and use the touchpad, but not when I hold down the middle button while moving the trackpoint. It will scroll a few lines and then stop, sometimes going up when I move down and vice versa, sometimes running away and scrolling way down the page. Is this a conflict between Marble mouse and ultranav? Can I reinstall ultranav if I uninstall it?