Barney removes the ring from a spool of computer tape twice and places it on a computer spindle and, both times, the same footage is used.
When Willy checks his watch various times while waiting, the face says "shock absorber" the first time, but then has no words the next few times.
Colonel Hakim, played by Martin Landau, has blue eyes, but when he removes his mask to reveal that he is actually Aristo Skora, played by Mark Lenard, he has brown eyes.
When Barney is starting to drive the nitro truck towards Government House, the truck starts moving before he releases the clutch.
The nitroglycerin in the refrigerated vault, some of which is stolen, is amber and liquid. But nitroglycerin is actually colorless, and is a solid at temperatures below 57 degrees Fahrenheit (14 degrees Celsius).
The rear brake line on the truck is damaged by a bullet and begins to leak fluid. Yet they drive the truck to the warehouse without noticing. Also, it continues to leak even when the brake pedal is not being pushed and leaks far more than the master cylinder would hold.
Trucks don't have hydraulic brakes. They use Westinghouse air brakes which would actually lock-in in case of rupture. Besides, the vehicles with hydraulic brakes have two separate hydraulic systems just in case one of them fails.
The truck the IMF team uses is supposed to be a foreign make yet the name FORD, though covered with tape, is clearly visible on the hood as is the distinctive shield emblem.
During the course of street scenes American street name signs and California license plates are seen.
When Jim is getting his instructions by manually turning the crank on the film viewer, he would not be able to do so consistently enough that the film images would not flicker, or the audio would not warble.
When Barney is trying to stop the nitro truck all he had to do is turn off the ignition.
Rollin starts a tape machine to play back the sound of an explosion, but the explosion is heard a fraction of a second before the machine starts playing.