Dell D800 w/128MB of video ram, WUXGA screen (which is currently running in 
1650x1050). 
 
The colors on dvd during playback are very very washed out, almost non 
existent.  The tiny little bit of color there is seems nearly right, just not 
nearly enough of it, almost like you are looking at black and white.  Moving 
the saturation adjustment changes nothing, though all the other adjustments 
seem to work.  If you change the hue, it properly changes it from black/white 
to, say, green/white or whatever, so the color is there somewhere...