I have a wonderful Razer Pro|Click mouse, but since I started using it with Razer's drivers, I suspected that the precision isn't as it used to be.

And I was right: While setting high sensitivity in Razer's control panel interpolates mouse movement correctly, Windows Pointer Speed setting "cheats" - when you set it on high, it just moves cursor by more than one pixel, when a message from mouse driver arrives - thereby reducing your hi-tech mouse to a normal office peripherial.

The result? Unability to click on certain pixel when you need it (cursor just jumps around, no matter how hard you try)..

Solution: Leave windows 'pointer speed' setting on one half (anything more will make Windows cheat), and instead, increase mouse precision in Razer's control panel (I don't have experience with Logitech or Microsoft mice, but I think it would be similar).

For testing of mouse precision, I prepared an applet in Processing, that shows (and magnifies) the movement of your mouse. Run it and tweak :).

See the Mouse Precision Test (click for more):