Factual errors

Early in the film, Mrs. Howard tells Bob that his publisher, Mr. Wright, called from New York. Weird Tales, edited by Farnsworth Wright, was actually published in Chicago.

Continuity

The door of the car that won't start shuts itself.

Anachronisms

When the school principal welcomes the teachers for the new school year, the U.S. flag in the background has 50 stars, whereas in the 1930s the flag would have only had 48 stars.

Anachronisms

The postcard Novalyne gets from Bob shows a green 1ยข stamp featuring Andrew Jackson that was issued in 1963, yet the film is set in the 1930s.

Character error

Enid says that Bob Howard thinks he's "Max Schneling" when he is pretending to box. The German boxing champ's name was actually Max Schmeling.