Here's a weird thing (and I know only a deep-seated Star Wars OCD would notice this): there's a shot in '83 Return of the Jedi where the Falcon flies through a wave of tie fighters, and it fires green lasers instead of the correct red (according to the "what has changed" article on the official site). And sure enough on the GOUT it's green. But...on my 1990 laserdisc it's red like it's supposed to be. And you can watch the Jedi TV spot on your official dvds and it's red there too. So this was actually changed but not in 97 or 04, it was done in 83, (maybe for a second wave of prints that summer? Or after it was too late for 70mm?)