If you have used the PAL UK set (it's written on the first page but i haven't read the whole thread), i remember it has (more or less annoying) curious color variation on the tatooine desert like "normal ~ a little greenish ~ back to normal.. etc
(i don't remember for the rest of the movie)
I brought it a while ago while i was looking for the best presentation (my French Set had dropout issue) but i sold it after noticing that.
The french set had not theses issue. (if i remember)