As Margo Wells approaches her target, you can see K.I.T.T in her rear window. A few seconds later he slides there, coming from her right side.
After K.I.T.T. jumps over the 2 cars roadblock, when he looks back, the cars are nowhere to be seen. Neither is the bridge thing that was under them. This was obviously shot at a completely different place.
When Margot is driving on to the airfield you can clearly see KITT is next to her through her driver side rear window. In the next shot we see KITT race from far behind her, we then return to the 1st shot to see KITT overtake her.
After Michael and KITT have stopped the assassins at the climax of the story, the shots of Devon as he comes out of the marquee to greet Michael are flipped back-to-front: his hair style is suddenly reversed, and the handkerchief in his blazer pocket is suddenly on the other side.
When Mr. Knight is asking what the problem is with the mission (and why it involves him), he transitions from walking towards Mr. Miles to sitting down.
When KITT x-rays the suitcase, he incorrectly refers to the 3 magazines as clips.
The three planes that deliver the leaders are not the same plane as the tail numbers are different. The first is N664CL, the second is A445H5, the third is not entirely readable but with a good pause the number can be seen as starting with L999.
After Jacobs unsuccessfully attempts to open K.I.T.T.'s car door, he smacks the door with his fist, leaving a dent in the supposedly impervious car.
On one of K.I.T.T.'s monitors can be seen a view of Ms. Wells driving her car. This view could only have been captured from inside of Ms. Wells' car and not by K.I.T.T.
As he rolls downhill toward the cliff, KITT says "The law of gravity takes precedent." In fact, the correct word is "precedence," which KITT would surely know given the dictionary built in to his databases.
When Mr. Miles is explaining that one of the security team may be a plant, his lips do not match the words.
Light stands, crew and equipment visible reflected on the rear of the brown sedan during the demonstration of the windshields being impervious to bullets.
Mr. Redmond states that waxed rounds leave a red mark. The marks left by the waxed rounds used by the trainees are white.