With NVidia's newest driver (51.75) the image quality is lowered a lot. A screenshot was taken taken on the same frame from the old 45.23 drivers and the new 51.75 drivers (along with the Cat 3.4 and Cat 3.7). The Cat 3.4, Cat 3.7, and 45.23 all displayed the same number of colors to within around 4% when looked at in Photoshop. However, the 51.75 drivers had nearly a 23% drop in the number of colors displayed in the screenshot!!
A flash image showing the difference in the 45.23's and 51.75's can be found here:
http://68.115.1.154:1037/public/fm/am3.html
Note: 45.23's display 12,696 colors while the 51.75's only display 10,370 colors in these cropped pictures. (difference = 2,326 (22.4%) more colors using the 4523 drivers)
A flash image showing the difference in the 51.75's and the Cat 3.7's can be found here: http://68.115.1.154:1037/public/fm/am35175vscat37.html
I thought that NVidia and ATI were going to be displaying the same images? NVidia displaying 22% fewer colors doesn't seem like the same image to me.