I've fixed it. I read something in the redhat forum archives that dealt with this same issue. I can't explain why this works, but it fixed my problem well. The mouse now works just like it does in Win2k. I read elsewhere that you can vary the resolution (someone else said 1000 worked for them), to find the setting that works best for your system.
If this works for you, and you can explain why, I'd be glad to hear about it. I'm pasting the link below, and following that I've pasted the relevant part:
http://www.redhat.com/archives/xfree.../msg00005.html
> You can do as I do, and manually edit
/etc/X11/XF86Config by hand, and in
> the mouse section, add Option "Resolution" "700" and
see if that makes it
> faster/smoother for you. I always do that after
initial install and mouse
> movements work like a charm.
>
> Below is a copy of my mouse section to see what it
looks like in the
file..
>
> Section "InputDevice"
> Identifier "Mouse0"
> Driver "mouse"
> Option "Protocol" "IMPS/2"
> Option "Device" "/dev/psaux"
> Option "ZAxisMapping" "4 5"
> Option "Emulate3Buttons" "no"
> Option "Resolution" "700"
> EndSection