There was some consternation over at the Home Theater Forum over the wire working the Cowardly Lion's tail being erased on the Blu Ray of Oz. Somebody explained you probably never would have seen the wire on a 1939 release print.
Whomever thought Judy flubbed a line in the scene where Toto is handed over to Miss Gulch, and took it upon themselves to wipe it even from the mono soundtrack, is the real screw up job!
I imagine the wires on the Learjet model shots in Goldfinger that have been touched up probably couldn't be seen in 1964 either.
I'd hate to see Cameron succumbing to Roger Rabbit syndrome though. That is, changing stuff people probably didn't notice until they looked at a movie frame by frame. Think I'll hold onto my CAV Laserdisc a bit longer!
There's an opportunity for me to see American Graffiti in a few weeks. I'm tempted to go just to see if the opening shot has been "fixed". ;)