Floating around the Internet is that new dialogue is being inserted into Return of the Jedi for the Blu-ray release. We haven't seen any official confirmation or denial up to this point, but a fan has taken the supposed leaked MP3 audio file and synced it up with the movie and put it up on Youtube.
Frequent listener's to The Forcecast will have heard Kyle Newman and the guys discussing, George Lucas' penchant for repeating themes, dialogue, concepts etc. in his film making. If "No" is inserted in RotJ, it would provide a symmetry with Episode III. When Emperor Palpatine informs Vader that he "killed" Padme in his anger, Vader goes on a droid crushing spree and utters "Noooooo." That show of emotion and remorse is probably the last true glimpse of the Anakin dominant within Vader that George imagines until the climactic scene in Return of the Jedi.
Of course it is also possible that this is much ado about nothing, and that we Star Wars fans irrationally jump to conclusions based on the smallest scrap of a rumor.
We shall see...