To those of you who use this mouse, have you got it configured in the Logitech Control Center settings, or are you just relying on Apple's mouse settings in Prefs? I've been struggling to get a good combination of speedy scrolling down web pages plus one-notch-per-page scrolling in multipage PDFs, without one sacrificing the other. (Yes there's the mode changer button - but I don't fancy the idea of clicking that several hundred times each day.) The only way scrolling seems to work correctly is if I uninstall the logitech driver and rely on Apple's settings alone - but then I lose some of the mouse's button and battery status functionality. If any of you could post up/describe your scroll wheel settings (Speed and Acceleration, plus scrolling speed in Apple's mouse prefs) that would be really helpful.