I am not sure if it is just my eyes, but it seems that from the start of the opening scroll, till the Star Destroyer passes, that one continuous shot seems much cleaner than the rest of the GOUT. Because that original scroll is not from the Laserdisc master.
So whoever put the original scroll in, obviously had access to a clean print, because the altered scroll was implemented in 1981, and was never on any home video release.
I might just be going crazy, ignore me if you wish. :P