Asaki said:

Hey Adywan, have you tried your hand at test color corrections on any of these Blu shots yet?

Obviously there's going to be compression artifacts, but I'm wondering if Vader's saber can go back to red without fudging up the rest of the picture.

Actually i was just doing a quick test. Now all i did here was adjust the hue for Magenta.

Now why couldn't Lucasfilm do something as simple as this?

I have also downloaded the HD version of the trailer and it does indeed look bad for the older docs as the reported problem does seem to exist in the two shots shown, while the rest of the trailer doesn't suffer with these problems. Well all apart from the shot of R2 and the wampa that definitely has some field problems