On the night before the law officers come to the Grapes Motor Hotel, a thunderstorm occurs. Keechie has a conversation with Mattie out in the motor hotel's courtyard, with both of them covering their heads from the rain. The next morning, when Keechie leaves her cabin and walks to the motel's office, the ground in the courtyard is dry. But when the law officers arrive a few minutes later, the ground in the courtyard is suddenly muddy and filled with puddles.
In one of the old radio clips early in the film, the announcer talks about Seabiscuit winning the $25,000 Butler Handicap at Empire City Race Track. The actual date of Seabiscuit winning that race is July 10, 1937, which would place it after the end of the movie which concludes in the Spring of 1937. (Also, later in the film, we hear a radio broadcast of Franklin D. Roosevelt's second inaugural address, which occurred on January 20, 1937. Although the Seabiscuit race took place six months *after* Roosevelt's second inauguration, the film places the race broadcast *before* the inauguration speech.)
When Bowie returns to his car after meeting with Captain Stammers, the prison camp warden, and his wife, the cameraman's reflection is briefly visible in the back right-side window of Bowie's car.