On Raiders...the sound appears to have been tweaked a little bit somehow. I thought a few effects may have been different but checking them against the DVD showed they were the same. However, the sound was quite wimpy. Compared to the DVD, which appears to be the same mix, it sounded flat and uninvolving and a bit tinny-especially the dialogue. Surround usage only fully appeared during big music cues, and revisiting the DVD this morning on my computer speakers showed the difference.
The image was extremely bright and being a 4K project printed back to film revealed more of the details. Color was extremely saturated, with skin tones being a noticeable vibrant orange-red. Blacks were also very strong, especially in the jungle opening. Basically imagine the 2003 DVD with Brightness, saturation and contrast increased (I tried this with VLC and got a similar looking image) Surprisingly there was little to no grain visible.
Snake reflection was still gone, Marion's still there, no CGI cliff shot, and I do think that a rod was removed from the boulder sequence (will have to get a widescreen LD to check as my VHS is pan n scan).
I think that the presentation I saw will be exactly like the upcoming Blu-ray release, but hopefully the sound will be more impressive. I'm still not sold on the overly bright looking image, and was surprised at how "clean" it was.
Anybody have memories of the '81 theatrical release or original prints?