Goofs

The skins of the bananas that Biff eats disappear from under the bench when he and Virginia stand up.

When Alan Hale gets thrown out of the saloon, his abundant white-and-gray hair is clearly visible, but the stuntman who lands on the ground by the pole has dark hair.

The movie is clearly set in New York, but when Biff meets Amy in the park after his release from prison, there is clearly a stand of palm trees in the background.

Immediately after Biff's fight, he has a black eye which takes a day or two to appear.

When the two policemen arrive at Biff's (James Cagney) home to arrest him, Biff addresses the one to his right as Matt. However, when he introduces him to wife Amy (Olivia de Havilland), Biff calls him Charlie Brown and states that the other policeman is Matt Hughes.

When Biff asks what song is being played, Amy answers, "Let the Rest of the World Go By." This was not published until 1919, well after the period portrayed in the movie.

The back of Olivia de Havilland's dress shows a zipper down the center. . Zippers were not used in this way until much later.

At 30:15, Biff says, "23-Skidoo..." The action of the movie takes place in the 1890s, and the phrase was not created until 1906.

Although the movie is set in New York, the Grimeses' neighborhood looks as if it is in a small town, with big houses and big gardens.