Factual error: When one of the men visits a doctor and learns he is terminal, the X-ray in the scene is upside down.
Factual error: Jack Lemmon cooks spaghetti for Xmas dinner. On New Years Eve he picks up the tennis racket, through which he had poured the spaghetti, and one piece hangs limp from the racket. It would of course, have long dried and be hard as before cooking.
Factual error: Throughout the movie, characters refer to the "Air Force", when in this time frame (1942-3) it was the "Air Corps".
Factual error: The prison in this film, Huntleigh prison, can't be very secure as the hinges are on the inside of the cell doors and the front gate opens directly into the exercise yard.