When Artoo is lying on the operating table in pieces, his eyepiece is dangling from its socket. But just before the Magnadroids enters, in one shot his eye is back in its normal place.
Five Clone Troopers are on the mission at Skytop Station. Two of them have blue markings: Rex and Denal, the other three are 'Shinies' and have unmarked armor. But after one of them removes a Battle Droid's head, there are four Shinies and only Rex has markings. After that, Denal's markings return for the rest of the episode.