Vaderisnothayden said:
Re the scenes not having dubbed or foleyed sound, the Jabba and Han and Biggs on Yavin scenes sure did when they were released as part of the SE and I doubt that sound was recorded with the actors in the 90s. If those scenes had it why not the others? Behind the Magic's versions of them may just have been crappy versions -maybe versions with improved sound did exist and didn't survive or weren't put on the disk for some reason.

Just so you know, not every scene in every movie has ADR. That's only done when production sound isn't adequate. It's entirely possible that what George filmed on that day contained sound that was good enough to be included in the film and didn't need to be looped.