If the shake was an optical effect, the orange errors were not introduced with it. Comparing the JSC V8 and Technidisc SWE in slo-mo, the shake effect is exactly the same, frame for frame. If it were redone, there would be some visual difference in the effect, since the "law of human error" dictates that if this kind of optical shake effect were redone, there would be a much higher probability that there'd be some kind of difference than that it would look *exactly* the same.
Since it does look exactly the same except for the orange errors, I have to conclude that the effect was not redone; the same footage is on both.
Those frames were obviously screwed up somewhere on the path to the IP that was used to make the theatrical prints, and from which the dupier-looking IP used for the DC/GOUT was derived.
I still can't figure out whether the 1980s IP was directly derived from the O-neg. It is certainly sharper than the source used for the '93 Technidisc SWE/DC/GOUT, and it also has more horizontal information and a little more vertical info as well. The two IPs also have different-looking glue marks on the splices.
The reason why I'm skeptical that the 80s IP was *directly* derived from the negative is because of some additional damage I see on the JSC, like the weird translucent blobs scrolling up the right side of the frame after Luke puts on the blast helmet, when Ben says "Your eyes can deceive you, don't trust them" and when Luke turns on his saber (I mentioned this before - they almost look like water damage). It is not negative damage, because it's dark, not light. I can't tell if that problem was on the preceding generation, whether it was due to the lab screwing up while making the IP, or whether the damage occurred to the IP after it was developed. Do those blobs appear on that scene on any of the video releases prior to the JSC?
As far as I can tell, the same IP was used for all video releases between 1982-92, even if it was telecined multiple times. If this is the "1985 IP", it wasn't actually made in 1985. If there was a new IP made in 1985, it must not have been ever used for video (and the 1985 complete-trilogy limited reissue used existing prints, right?). Using none's site, there seems to have been the P&S telecine used on the '82 VHS/Beta and the '85 LD (also shown on CBS), the time-compressed P&S telecine used on the '82 LD and CED (also shown on HBO), and a different P&S telecine on the '92 LD dark_jedi preserved (the cropping is shifted a bit to the left, and the corridor walls don't have as much of a pinkish-brownish tinge as the VHS/Beta/'85 LD. I don't see enough visual difference to suggest it came from a different film source, though.
At some point, it'd be interesting to do a visual comparison of EVERY SW video release, P&S versions included. Anybody got the 1987 and 1990/92 P&S VHS releases?