When Sandra is going diving she has her hair loose, except for a small plait at the front, however her stunt double has her hair in full plaits - no loose hair.
When Gerry's car knocks and stutters when he shuts the engine off he explains to Brian that his mechanic told him that that it needs a new short engine (what is called a "short block" in the United States), which is an engine that is complete except for the cylinder head. Knocking and running on after the ignition has been shut off is a symptom of either fuel issues or combustion chamber issues, and doesn't involve the bottom end of the engine at all.
Brian Lane states that air is 70% nitrogen. It is actually about 78% nitrogen.
When UCOS are watching footage of divers finding the armored van, Brian and Sandra are reflected in the screen, they're are talking but their reflections are motionless.