Audio problem: When Ford and a terrorist are fighting in a side room, he knocks him out with the stool. He clearly grabs the stool by the metal legs, hitting him with the black cushion part and yet a metallic 'clang' can be heard. Even a metal bar against your head wouldn't make that noise.
Audio problem: The same "Ahh Jesus!" shout is heard from two different people when Air Force One tries to land at Ramstein, once by one of the hostages and once by one of the air traffic controllers.