I grabbed this Tuesday morning off the cart before they got it on the shelves (hey; I don't have to wait until the door open...it's every man for himself on release day!), but have only watched Raiders so far. I sold my video tapes close to ten years ago during my personal "economic upheaval", so it's been a long time. I don't have a home theater system, but just stereo speakers, but the sound was different. I could hear, for instance, the discussion among the students when they were leaving Indy's classroom much more clearly. I remember also seeing an added scene, but I'll be damned if I can remember what it was.
Stefan, I'll try to watch Doom today as I'm off (and the heart scene will be too intense for the wife anyway; she's such a wuss with this stuff. Hates snakes, too...) and see what I see. I know this: the scene you mention needed fixing. I hope they fixed the plane crash as well...