Since you mention doing another version of ESB....
There's a shot of Star Destroyers that looks really off to me. I think it's a problem with the 2004 master (possibly introduced by the crushed blacks, or maybe the resompositing, or maybe some of both). I've never noticed this until I started watching fan preservations using the 2004 versions as the primary source. But I'm lead to believe it must be in the original 2004 source material (I've never actually watched the 2004 dvd's themselves) b/c it also appeared in Adywan's ESB 1980 reconstruction.
Anyway, enough background. Check out the Star Destroyer on the bottom left of the image:
And now a closeup:
And now the same shot from the GOUT:
As you can see, during the creation of the 2004 version, they somehow erased the middle of the ship! I know the pictures are crappy, but watch it & you'll see quite clearly that the original version the ship was intact with no weird anomoly in its center... I don't have the 1997 SE anymore to check how it looks there, but I'm betting this problem was created in 2004.