Quick question then.
Why doesn't either Owen or Beru remember C-3PO? R2, I can understand, he wasn't around them all that much, but C3P0 lived them for what a couple of years? The only thing I can think of is that they act like they don't know him to sheild Luke from his father's past, but that seems rather flimsy to me.
Maybe they did...maybe that's why Owen was getting on Luke to get there memories erased so quickly.
On another note, watching RotJ right now, one of the little edits I hate is when Han is trying to get Lando after he gets the blaster and Lando says "I thught you were blind." and they change it from "It's all right, trust me." a classic Han line to "It's all right, I can see alot better now."