Just watched ESB for the umpteenth time on DVD. There were some changes made to make it more compatible to the PT which I will point out here. I believe they were great changes and helped me get into the movie more.
1.Boba Fett's voice-replaced with Temoura Morrison's voice, connects clone idea.
2. Vader's Conversation with Emperor-totally changed to revolve around idea of offspring, Vader deceiving the emperor (nice touch) and its good to see the Emperor again after an Episode hiatus.
3. New graphics-especially with Cloud City-made it look more PT-ish.

Got to go to bed. Look for new entries on a variety of subjects tomarrow.