Arnie.d said:

So at most there is 2 frames difference. That's something like 80ms, right? Is that like even visible?

Depends who you talk to, what the audio in question is, and if the audio leads or follows the video.

In my experience, with the sync differences in Star Wars, 2 frames is right at the edge of perceptible, 1 frame isn't noticeable. With 2 frames, I only notice on dialogue that's spoken by someone who speaks quickly and moves their mouth a lot (i.e. Harrison Ford), not on any other dialogue, sound effects, or music. Since the 2-frame difference in ESB is after Solo's already frozen, I don't see it. The 2-frame difference in Jedi, on the other hand, I can. YMMV of course.