I have heard it confirmed that Vader says "No.". But those nos sounded ripped from RotJ "No. I will deal with them myself". And the second one from the infamous "Do Not Want" in EpIII.
Either way, two additional words said doesn't ruin anything for me personally. Nor does the changing of the Krayt Dragon howl. I get that some people like the original noise, but as a kid I didn't know that Obi-Wan made that noise until after readong books. That actually looks like he's making that noise there.
But again, nowhere near as bad as the Greedo travesty.
By the way, there are
some improvements that make sense. Such as making ewoks blink...
http://www.youtube.com/watch?v=RnLgh3dudSkThough I'm sure some will still bitch about tampering with it. Even though ewoks were hated by fans when they showed up in the first place...