In the audio commentary of Phantom Menace dvd, they mentioned two errors that I haven't seen mentioned as being fixed.
Near the ship on Tatooine, Obi Wan's rat tail is on the wrong side because the shot was planned to be reversed but never was.
During the pod race, Selbulba's car is missing Sebulba and is basically being driven by nobody for a few shots in the background.
Have these been changed?