Problem of analogue controls smoothness in low res

[Gradius]

When I use hardware stretch and a high res mode (1024, for instance) the paddle in arkanoid and other games which use analogue controls (usb mouse in my case) move very smoothly so it's perfect. When I don't use hardware stretch and use a the native low res mode the paddle moves more jerky. Actually I notice that setting my desktop to a very low res (I'm using ArcadeVGA with w2000) the mouse cursor moves not as smooth as in high res mode. I've tried several mice and the problem is there. I suppose this has an explaination and a remedy but I can't figure out. I've been testing different settings in analogue controls and varying the mouse speed and acceleration in my mouse properties.

[Minwah]

I've never heard of that problem, but make sure you turn hardware acceleration OFF...