Continuity mistake: When the guys use the key to steal the car, its back license plate number is 4N-4290, but when Chico pulls into the drive-in, the front plate number is SV-5875. Then when Chico reverses the car, the front license plate number is 4N-4290. (00:42:40)
Continuity mistake: When Buster and Billie are at Slim Mim's Jamboree near the end of the film, Buster is wearing an open-collar shirt. When they step outside to get some air, it changes to a button-down shirt and tie.
Continuity mistake: Nini's mother fishes the telephone out of the bathtub. A naked little boy prances around the room and Christian De Sica is in a quite recognizable position, leg up scrubbing the sole of his foot. Cut, and De Sica is now simply sitting in the tub as if nothing happened. (00:22:00)