Apparently George Lucas couldn't leave well enough alone, again, and tweaked the Star Wars films for the new Star Wars: The Complete Saga (Episodes I-VI, Blu Ray). As seen in the above clip, Vader now screams "Noooooo!" as the Emperor electrocutes Luke in Return of the Jedi. Also, the Ewoks apparently now blink. Sadly, Yub Nub was not added back to the film. After the jump, Obi-Wan's new Krayt Dragon call that scares off the Sand People (leaked new audio with old video).
"Lucas Added Vader Crying “Noooooo!” To RETURN OF THE JEDI" (Badass Digest, thanks Gil Kaufman!)