If you are using the nv driver on a laptop I recommend trying turning "FPDither" on. It makes a huge difference in display quality.
So in the "Device" section of '/etc/X11/xorg.conf', add this
Code:
Option "FPDither" "True"
I didn't know about it, but was trying to fix the weird 'bleeding' colors my screen gave me. And that fixed it ... which is awesome
Hope that helps. Maybe you already know this...
Why am I posting this here ? Because I'm using Slackware. I guess you guys can move it if you want.