Besides the Greedo thing, certain shots of the guards being hit by laser blasts during the fight in the prison block were slightly trimmed so that the burning holes in their bodies are no longer seen.
Regardless of how much death & dismemberent there is in "Sith", the new version of "Star Wars" (A New Hope) is
undeniably softer than the 1977 original...whether you realize it or not. So, Montana is correct in that regard.
As far as I'm aware, the only difference between the HD broadcasts and the regular DVD versions is the replaced jeep/cliff-shot in "Raiders". Apart from that, Montana might be worrying for nothing.