Here are three screengrabs which I've fit to the bluray dimensions. There's different warping on the stills in question, so it's pretty clearly a new scan:

http://screenshotcomparison.com/comparison/83700/picture:0

The skintones look much better on this scan, as well as the shadow detail (check out the switches behind C-3PO and the X-Wing starfield). The oppressive pink flashes are handled much better as well. The reds are not bleeding, nor are the greens (R2's green panel lights), and the exposure is far better here. The only gripe I have is that C-3PO looks too green, but that's small potatoes compared to the dramatic jump in quality in this scan.

JEDIT: http://screenshotcomparison.com/comparison/83709/picture:0

The shadow detail regained in the trench run shot is quite excellent.