Okay, there's actually a more significant problem than anything about corners or even colors, and this is gonna have to be decided before anything else can really get done.
Jorel81 PM'd me to let me know there was an audio synch error at the end of the movie—I checked it closely and he's totally right; beginning at 01:44:18 (approximately frame 150,210 or thereabouts) the audio is no longer in synch with the video, but is consistently too early. According to this post, the NTSC version of the GOUT is missing two frames compared to the PAL version. I can't see the pictures in the post anymore, but I remember that it is the last two frames of the shot where Luke jumps off the platform to follow Vader—this is a reel change, if I remember correctly. Because the audio is synched to the NTSC, but the video is being made with reference to the PAL, this means the two are no longer aligned for the last 20 minutes of the film. All the sound is happening in advance of the picture, which is unnatural and obviously incorrect.
This PAL vs NTSC time discrepancy also showed up in RotJ, but there it was more noticeable because it affected a much longer section of the movie, creating obvious lip synch errors in dialogue scenes. Since there isn't as much talking at the end of ESB, perhaps it's not surprising this error has so far passed unnoticed. I actually do recall somewhat noticing this previously, and now that I've investigated the matter more thoroughly, I'm never going to be able to unsee it. This has to be fixed before any release can take place . . . but the question is, how do we fix it?
This is actually a conversation I've had with dark_jedi concerning future releases of RotJ, and since he uses my audio tracks on his versions as well, he should also weigh in for this. The easiest thing to do would be simply to chop out the extra frames to make the video match the NTSC version of the GOUT. This way, any audio track that has been synched to the NTSC can simply be dropped in and will work without any additional labor being required. However, the two frames are a legitimate part of the film, and the NTSC is technically 'wrong' to have dropped them, so if you want to get 'purist' about it, they should be left in . . .
Keep in mind that it is common for frames to be dropped at reel changes on both theatrical prints and home video telecines, which is why the reels are chosen to begin and end in places where this would be unobtrusive. Without a comparison between them, you'd probably never notice that one was slightly shorter than the other. If Harmy wants to keep the frames, then all the audio tracks he plans on including will go out of synch if they were made with reference to the NTSC, and will require realignment to fix this issue (which will then make them incompatible with other video releases). Editing the video is by far the easiest solution. I can edit some of the audio to match the PAL video instead if need be, but for reasons of compatibility and the potential confusion this could cause, it may not be the best choice to do so.