Yeah, GL is an ass. They eventually released the original, unaltered original trilogy, but used a really, really poor master and didn't bother cleaning it up the print.
Didn't they claim it was because the original master no longer exists because it was physically chopped up for the 1997 remasters?
I think they did claim that, which I think would be a horrible thing for any filmmaker to do with his own originals.
Also, Star Wars: A New Hope was inducted into the National Film Registry in 1989, so the print they have should be an original (otherwise, it would defeat the purpose of their whole film preservation initiative