Continuity mistake: Big Joe gets out of his jeep, salutes Captain Maitland, and converses about the upcoming time off for the men. Behind Big Joe is one of his half tracks and he is on Maitland's right. The scene cuts and Maitland's "liberated" yacht is behind Big Joe and he is directly in front of Maitland. (00:25:00)
Continuity mistake: During the attack a parked US plane is blown up and the prop goes cartwheeling off along the runway. Not wishing to waste a perfectly good explosion the director filmed this from several different angles and used the same explosion several times. You can easily see the prop each time.
Continuity mistake: During the entire battle the ground is sticky mud. When the French cavalry charge however the ground is dry, so dry there is dust coming from the horses' hooves as they gallop.
Continuity mistake: When one of the apes shoots the horse, Brent and Nova fall off the horse and land about six feet away from it. Shot cuts and they are suddenly only about two or three feet away from it. (00:31:00)
Continuity mistake: Digger blocks the odd karateka fellow and pins him by the door. His hand goes from the wall, to inside the door opening between shots. Similarly, as he is talking, the camera is on Ed, who holsters (with some kinda out-of-character difficulty) his gun and places a hand on his belt, only to have the same arm fully relaxed down his side in the following shot. (00:24:55)