As the camera changes front views of both Jackie and Kiss during the street crowd scene, two extras (a dark-haired woman in a checked suit and a bald man in a blue suit) are simultaneously located viewing the action behind both Jackie and Kiss.
Though the film is set in the 1930's, modern railroad freight cars not introduced until the 1970's are seen behind Jackie early into the film.
Though the film is set in 1935, Nancy calls Jerry 'Batman' in the car at the beginning of the movie. Batman didn't debut until the 27th issue of Detective Comics on March 30, 1939.