The blue haze around the Falcon's engines was in DEED 1.0. I pointed it out at the time, but Harmy said he wouldn't be doing anything about it. I'm not sure any of the pre-dvd releases have the resolution to prove this one way or another. To me, it looks a lot like the blue haze that surrounds the Death Star explosion.

The burn mark is a neat touch, but I think it's distracting and takes away from the viewing experience. It's something that would be removed in a serious (i.e., non-Lucasfilm) restoration.