Other mistake: At the end, when Siegfried is about to shoot Max, if you look in the chambers of his gun, there's no bullets in there. So Siegfried is going to kill Max with a puff of air.
Other mistake: The announcer says that the competitors have to run a mile in seven laps. When Hymie begins running, it is clear that the track is way too long for seven laps to qualify as a mile. Maybe it qualifies as 4 miles, perhaps.
Other mistake: There are several shots of the carrier pigeon flying home from the group of agents, but in those shots it is not a pigeon. Pigeons do not have wings that big.
Other mistake: Siegfried pulls out a pigeon and says that it is going to the Pentagon, but if you see his position compared to an earlier shot of the cages, he pulls out the one that is going to London.
The Little Black Book: Part 2 - S3-E17
Other mistake: When the KAOS assassin fires at Max's window, there are no bullet holes in the window when there should be.
The Wax Max - S3-E20
Other mistake: When there's a close up of Max firing the rifle, the rides that appear in the next shot should have been visible right behind him.
Viva Smart - S3-E2
Other mistake: The glass of lemonade that the room service drinks is poisoned. The room service says it's for the other room when Max tries to drink it, but if you look closely, Don Adams does drink a bit of the liquid, so he should have died.
Viva Smart - S3-E2
Other mistake: At the carnival scene, in one a close-up shots of Max and 99 performing, a female extra in one of the windows waves at the camera.
The Spy Who Met Himself - S3-E1
Other mistake: During the fight scene at the airport, Smart grabs a handful of soil from a nearby potted plant... Which has no plant in it and is just a random pot of soil in the middle of an airport.
Other mistake: The same dungeon set is used several times throughout the series, just furnished differently.
The Spy Who Met Himself - S3-E1
Other mistake: Max cuts through bars to escape his prison cell, but when he cuts them, he does the top part of two of them, and then the bottom part of only the left one.
Washington 4, Indians 3 - S1-E6
Other mistake: When Max tricks the Indian's daughter, he is supposed to say, "Now close your eyes and open your mouth". Instead he says, "Close your mouth and open your eyes". The Indian woman still reacts with closed eyes and open mouth.
Other mistake: The same shot of Max charging on his motorcycle is used twice in less than a minute.
Other mistake: Max collapses and spills the antidote on the floor, but there are no wet marks when the Chief bursts into the room.
Other mistake: During the scene in the prison cell, the first shot has a hair sticking to the bottom right of the screen the entire time.
Other mistake: In one of the car wash fight scenes, two men accidentally kill one another. According to the angle of one of the guns, you can kill someone without actually hitting them.
Maxwell Smart, Private Eye - S3-E5
Other mistake: At the Alledon Arms shootout scene, an agent sneaks behind Max and Max shoots him dead, but at the angle that Max fired, the bullet would have hit the concrete, not the man.
Witness for the Persecution - S3-E3
Other mistake: In Max's apartment, the KAOS agents fire bullets everywhere, but nothing in the room sparks, explodes or does anything when hit by bullets.
Suggested correction: Assuming the submitter meant Max (since there is no Ma character in this episode), the agents aren't firing at anything in the room other than the Cube of Safety, which isn't made of a spark-able material nor would it "explode".
