George Balanchine's name is misspelled as "Ballanchine" in the credits.
In the "Slaughter on Tenth Avenue" number, Eddie Albert runs up a set of stairs and falls down them again. As he stands up, he draws near the man he has killed, coming from stage left. The camera pans down Albert's legs to a full shot of the dead man. As the camera pans up again, Albert's dance double (and his tell-tale shadow), jump into the scene from stage right.