Revealing mistake: In the scene near the end when water is filling up the submarine, Kirk Douglas begins fighting with a member of the crew to escape. As Douglas hits him his false sideburn falls off and flies across the screen.
Audio problem: During the "Whale of a Tail" scene, there are several instances when Kirk Douglas' hands are away from the guitar strings, to ring the bell or twirl the guitar, yet the sound of the guitar strumming continues without missing a beat.
Continuity mistake: Before the Nautilus rams the munitions ship emerging from the harbor, there is a land mass on the Nautilus' starboard side. After the Nautilus attains collision speed, the oncoming shot of the Nautilus shows no land mass.
Revealing mistake: The close ups of Ned Land and Conseil in their diving gear as they discover the sunken treasure were obviously filmed on a sound stage - there are no bubbles emanating from their helmets as shown in other actual underwater scenes.
Audio problem: After the order "Beat to Quarters" is given, the Senior Petty Officer shouts orders, but no sound is heard from him. Further, the crew runs around shouting and no sound is heard from them.