How about digitally painting over Sebastian Shaw's eyebrows so they'd match the burned face that Hayden had even when Revenge of the Sith had yet to be released? Want another one? I got one. Changing Ben's noise to scare away the sandpeople to match that horribly annoying lizard creature he rides in Revenge of the Sith. When I first saw ROTS and realized that it was the same noise I'd noticed had been changed several months earlier, I wanted to strangle somebody.
DAMN! I forgot about those. The senate building is at the end of ROTJ too, along with Naboo (and Jar Jar as the gungan shouting out "Wesa freeeeeeeee!!")