Other mistake: When Kirk Douglas 'appears' to pull a knife from his collar and throw it into Lee Van Cleef's chest, you can see Kirk pick the knife up from a trough in the front edge of the bar. The knife is already in his hand when he reaches to pull the knife from his collar.
Other mistake: When Cary Grant came to visit Deborah Kerr, he laid his coat and hat in the chair. Later he remembered he had a gift from his grandmother for her. He did not have it when he came in. Someone had to put it under his coat.
Other mistake: When Travis shoots Yeller, his gun (a .50 Cal black powder rifle) doesn't kick at all. Ordinarily a gun of this type kicks hard enough to leave a bruise.
Other mistake: In the scene in the office with Jack Hawkins and William Holden, where William Holden is arm twisted into going back to the bridge, the oscillating fan, which is on and oscillating, has no blades, plus there is no breeze in the office. You can see the complete motor, plus the drive spindle, where the fan blade should be attached. It dominates the scene, along with the two actors.
Other mistake: Near the beginning of the movie, at the same time the ship makes radar contact, the sub acquires a signal on its oscillator. The sub captain thinks it's a false echo due to the rough seas. He so advises the next man that comes on duty but tells him that if the signal appears to get any closer, "you will awaken me immediately." The captain isn't awakened until the "dive" alarm sounds after the men in the conning tower make visual contact with the ship. Wouldn't the oscillator signal closing in on the sub have warned them long before they made visual contact?
Other mistake: About seven minutes before the end, the geologist and company and a Highway Patrol car go to the edge of town to get a better view. As the Highway Patrol car skids to a stop look on the road and there is already a longer skid mark. I'm guessing that in the first take the car skidded too far.
Other mistake: When Lindbergh is forced to parachute out of a stalled plane near the beginning of the movie, the plane goes into a spin. It crosses the screen twice, first below Lindbergh's parachute and then above, indicating that Lindbergh is falling faster than the plane (which is possible, since the plane is spiraling rather than falling straight down). However (as indicated by the loud noise heard off-camera), the plane somehow manages to hit the ground first.