That a number of different objects are rendered slightly differently in each benchmark run explains many of the supposed image quality anomalies associated with NVIDIA's 52.16 drivers and the latest build of 3DMark03. The only screenshots I've seen with image quality differences highlight the above objects.
- The smoke puffs when the doors open & close in game test 2
- The magic flame of the sword in game test 3
- The girl's hair in the face close up camera of game test 3
- The biggest explosion in game test 1 when the two bombers collide, or actually one single particle system there
NVIDIA's optimizations still violate the company's own internal optimization guidelines, and indeed Futuremark's optimization rules for 3DMark03. However, it looks like the optimizations are at least breaking the rules without compromising image quality.