Continuity: At the end of the scene in which the Baron asks Flaemmchen for a date, he moves from behind her left shoulder to behind her right shoulder twice. Also, the Baron's cigarette seems to disappear without any indication he put it out.
Continuity: As Grusinskaya is on the phone (while the Baron is watching), she holds the receiver with different hands between shots.
Revealing mistakes: When Mr. Kringelein drunkenly slams his door shut, the wall visibly shakes.
Factual errors: Although correctly signed with licence plates starting with an "I" for Berlin, all the cars are right-steered. In Germany they drive on the right (and ever did so), so the wheels should be on the left.