penguinofgreatness said:

The only change that was for the better was the new music at the end of ROTJ. I think it ties up the film more satisfyingly. And I still like the original music. Everything else is pointless or utter crap.

I agree that the victory celebration music was better, but not so much that it warranted a change.

In Star Wars, The new shot of the sandcrawler approaching the camera was a definite improvement from the original, and the cell block extension fix. The swooping motion of the Falcon after Han blasts at Vader in the battle of Yavin was much better, as well as the cleaned up optical effects shots. There were a lot of little improvements that I enjoy, but completely destroying this effect were the pointless cgi additions.

In Empire, I can't think of anything that was better in the special edition.

In Jedi, apart from the victory celebration song, there was nothing that I remember that was improved.