I can't speak definitively on every aspect of Raiders' appearance, but I can state with absolute certainty that the DVD version is not always completely faithful to the original look of the movie. Watch the scene in Marion's bar on the DVD, and get a look at how much red there is in the whole scene. When I saw an old 35mm print a few years ago, I specifically noted how very different from that it appeared: the red just wasn't there at all. The print probably wasn't a perfect reference, being somewhat worn and slightly faded, but that's nowhere near enough to account for the scene looking so vastly different.

So imagine my complete lack of surprise when I saw an IMAX showing last week and that scene scarcely had any red in it whatsoever.

I'm not saying the new transfer doesn't have flaws or hasn't been manipulated digitally, but unquestionably it is closer to the original colour timing than previous editions.

The sound mix is not the same as what's on the DVD, as some have said. They're close in a lot of ways, including the use of the original stereo surround effects, but the bass has been toned down compared to the previous 5.1 version. Again using the bar scene as a reference, all the gunfire during the shootout has a lot of low end reinforcement on the DVD, but in the new mix this was just absent. Elsewhere in the film the bass is generally present, but seems reduced somewhat in level. Which is closer to what was included in the 70mm version I don't know.