Corrected entry: At the beginning of the episode, KITT prepares to back out of the semi. As the door is lowered, we see KITT's back-up lights on as though he's in reverse. But in the next shot, KITT starts his engine. It's impossible for back-up lights to be on when a car's engine is off.
Corrected entry: Across episodes, especially the earlier ones, the color of the lights around KITT's voice modulator change. Sometimes they are all red, sometimes the top four (AIR, OIL, S1, and S2) are orange while the lower four (P1, P2, P3, and P4) are red, and so on. Most notable is S1 and S2 trading colors with P1 and P2.