From a post (cool screencaps) on the mf.com:-
http://millenniumfalcon.com/phpbb/viewtopic.php?t=1627
"1) the Lightsaber sound effects error in the Wampa cave (saber shutoff sound though saber is still on) is still present.
2) The Emperor Hologram (with substituded Ian McDiarmid, of course) flickers more than the last one did, even to the point of almost blinking out completely in some instances. I don't mind this--they are still recieving a signal on the outer edge of an asteroid field, so it works if you keep that in mind.
3) the Hoth battle effects look better as a result of the cleanup. No opacity issues at all, as far as I can tell.
4) it's still "you were lucky to get out of there." instead of "you're lucky you don't taste very good
5) the "han's vest is off" "no, it's on" error that people talked about during the "I love you--I know" scene has been definitely cleaned up--the transfer shows that, as a matter of fact, it really IS simply a shadow across the top of his shoulders, and not a continuity gaffe. Much more clear.
6) the scream as Luke falls is indeed, gone.
7) The "alert my Star Destroyer.." line is, indeed, still there
8) the print damaged line that flickers across the screen as Artoo falls into the Falcon workpit (a scratch I remember made it into the SE's, even) is gone.
9) every line of Boba Fett's has been re-done by Temuera Morrison.
10) matte/optical work has been cleaned up. No matte boxes around any of the ships anymore.
11) The credits are identical to the Special Edition credits. Meaning: No McDiarmid credit.
12) and yes--if you're looking for it, Vader's saber during the duel WILL look a little pinkish in some shots. But again--checking it against screencaps and the SE VHS--the pinkish hue is still there anyway, so it's simply the transfer revealing flaws that older video releases hid.
And all warnings about harshly judging video quality off a rip that compresses 6 gigs to 1 gig still apply
Other than that, I couldn't spot any alterations or additions, or subtractions of any kind. The transfer is ridiculously good, though, so I'm betting there's going to be a lot of people who THINK they saw something new, but in fact it's stuff that was always there, the clarity and the colors and the contrast make it LOOK new"