Well, after re-watching the cantina scene a couple of times, I have to agree with what most people have already said. The shot of the severed arm just doesn't look right and kinda sticks out in an otherwise perfect edit. With all the work that has been done on this project so far I think it's probably for the best to take a little time to re-work that shot so it blends in better with the movie. Ady's last couple of posts sound like he might be considering some adjustment to the shot so I'm confident that it will be perfect on the DVD release.
By the way, as far as the desaturated color on board of the Death Star, I personally think that's a very welcome improvement. The Death Star is supposed to be very drab and gray in my opinion that's how it always should've looked.