Character mistake: When Tom is talking to Riff on the phone, he mentions that he is listening to the Ramones's latest album. However, the song playing as he says this is "I Wanna Be Your Boyfriend," which is from the Ramones's first album.
Character mistake: Isaac is supposed to be 42 and Tracy is supposed to be 17. He says "when you're 36 I'll be..." and she completes the sentence with "63". It should be 61.
Character mistake: Gene Wilder as the rabbi leaves the Torah on the floor of the porch of the home of the synagogue president. A rabbi would never put a Torah on the ground.