During the first car chase when the silver car they are in crashes over a police car (coming out of an alleyway) the fuel cap is open. In the next shot it is closed again.
At about the 24 minute mark Tuliver stop the car and says "hate to love you and leave you" then he opens the door for her to get out. When the camera angle changes and he says "Today sergeant today" the door is close and she has to open it.
During the car chase through the city (silver car), the right outside mirror intermittently changes in-between cuts from several stages of slightly damaged and hanging loose, even after it falls on the road after a sideways crash.
During the car chase through the city (silver car), both sides of the car are damaged, but when Captain Jack Tulliver lets Kelly step out of the car only the left side is damaged.
In the car chases (with the silver Opel Calibra) the streets used are in different parts of Bucharest and the shots keep jumping from an area to another and back as if one street followed the one before.
The cars used by the police in the movie are models that the Bucharest Police Department have never used. The police logo on the side is also different from the real thing.
Just before Tuliver rescues Spanky, during the firefight we can see the right side of Tuliver's AK-47 like assault rifle. The fire selector is on safe.
The Marine Captain entering the police station is not under arms (wearing or carrying a weapon) but is still wearing his cover. According to MCO P1020.34F of the Marine Corp Uniform Regulations: Headgear is normally removed indoors except when armed and on-duty. In the same scene, the captain is wearing his rank insignia diagonally on his collar, but according to section 4005, the device is to be worn parallel to the deck.
During the car chases the stunt driver of the silver car (who is white), is visible in many shots.
Marine officer introduces himself as a Major but is wearing silver oak leafs (LtCol).