Two men give Number Six a lift in their buggie from the beach to his residence. When the car is shown driving off, Number Six is missing.
When Number 12 gives Number 6 a pass to get inside the building, Number 6 uses two hands to examine it in a close-up, but only one hand when it cuts farther away.
As the professor's wife holds Number Six's drawing of her, a repaired tear can be seen running across the middle of it before she tears it in half a moment later, indicating it had been already been torn in a previous take.
The "input device" for The General was simply a photocopy machine and the paper seen being fed into it appeared to be minutes for a high school board meeting discussing a treasurer's report and purchase of football uniforms.