A couple of other ESB things that have always bugged me are the still visible compositing flags (epecially the one which follows the Falcon as it enters the Asteroid cave) and more so the obvious matte painting of the Rebel Hanger that cuts in just after Vader's first scene.

We have this wonderful full sized set (often seen out of focus in the background which adds to realistic feel of the hanger shots) and then suddenly there is a painting which really looks like a painting and it's in uniform focus (the effect is in some ways even worse than the similar shot of the Falcon in ROTJ because of the beauty of the rest of the sequences in this film).

Is there some way that the painting element can be adjusted so it looks a little less in focus and is colour corrected for distance?