Continuity mistake: In the first boat chase scene a truck comes along the bank of the river with a machine-gunner on the back. When the driver of the vehicle is shot by Rudy with the flare gun, the truck is seen and smoke pours out of the truck's cab to the point where it's hard to see the machine-gunner on the back. Then in the shot where the truck is seen from the boat, there is no smoke at all. Then in the shot of the truck, the smoke is pouring out of the truck's cab again.
Continuity mistake: Dirk, Al, and Eva are trapped in the Civil War ironclad. Dirk sends Eva to find fuses for the 150 year old cannon on board the ship. She runs across the room, falls through rotten decking to the deck below and is completely covered with sand. In the next shot as Eva gains her composure from the fall, the sand has disappeared.