Trivia: Not really a mistake, given the need for drama (and explosions) in a war film, but since we know the mission takes place the evening before D-Day, meaning the Allies had complete air supremacy, and they knew the exact time, date and place of the meeting of the German officers, this mission would never have taken place. The chateau would have been flattened by a squadron of heavy bombers, most likely RAF Lancasters carrying 10,000kg "Grand Slam" bombs. Lee Marvin, an experienced combat veteran, pointed this out to the producers and was told to keep his opinions to himself.
Trivia: When Luke escapes for the first time, he is being chased by a loose dog dragging a leash. Luke jumps over all kinds of obstacles to make it tougher for the dog chasing him. Finally, Luke dives off a bridge into a stream. In the theatrical version, the dog also jumps off the bridge, but the leash gets caught on the bridge and the dog gets hung.Quite a shocking sight. In the videotape and other releases, the dog boss (Anthony Zerbe) claims the dog died from exhaustion, you never see the dog get hung.
Trivia: After Elaine screams and landlord Norman Fell comes to Benjamin's door, one of the boarding-house kids asks, "Should I get the cops?" Look closely: That kid is Richard Dreyfus.
Trivia: During the title sequence, as Millie is buying a pack of cigarettes from a vendor her undergarment breaks, the vendor stares at her in surprise, and she does a slight curtsy and walks away. When the film was originally released, that was followed by a quick shot of the vendor looking down and seeing Millie's broken undergarment lying on the sidewalk, but for some unknown reason that shot has been deleted, at least from the version on VHS and the one shown on TV. (I don't know whether it is included on DVD.).