I've known that Lucasfilm messed up since the DVD came out. In the sand dune scenes with C-3PO, there are artifacts that indicate that he was adjusted separately from the background. Badly too. There some faint indications in several of the shots, but in the closeup with the skeleton behind him, the sand under his arms is green. It is really obvious when he raises his arms and you see the green sand next to the tan sand. Not a lot of people notice that. I even had to point it out to Harmy when he didn't fix that in DE 1.0. He has fixed it in 2.5 and I lifted those to shots from DE 2.5 to fix the bluray. Lucasfilm wasn't so heavy handed elsewhere, but I suspect that they messed with other scenes. I just haven't identified which ones.