Continuity: S12, E14 'Ungroundable': When Butters enters the computer room at the start, he approaches from the screen right. Camera cuts to the doorway and now he appears from screen left.

Factual error: S12 E6 Overlogging: Kyle says he has to log on before school. The next shot shows "Monday 8 days later." 8 days before is a Sunday.

Continuity: Butters' dad's first name changes from Chris to Steve as the series progresses.

Deliberate "mistake": Whenever Chef has his pointer finger up, if you see his hand, he has 5 fingers, but when he opens them all the way, he only has four.

Continuity: When ever you see Mr. Mackee he has nothing connecting his glasses in the shots showing the front of his face. But in the side of his face shots you can see he does have a connector.

Continuity: In many episodes, the word "chef" on Chef's apron goes from lower case to upper case, within the same episode and usually happens instantly between shots with no time for him to change the apron.

Continuity: In the classroom there is a poster of Christopher Columbus in the back wall in the class. In the last shot of that scene you can notice that the poster has disappeared and is replaced with an astronaut poster.

Continuity: Mr.Garrison's glasses change throughout shots,from a thin pair to a bold pair.

Continuity: The stars keep changing(especially the sparkly big one)position when Cartman is tied to the tree.

Continuity: After Stan vomits from Wend talking to him, the vomit disappears in a few shots.

Continuity: In the classroom scene where Kyle tries to be excused from class to find Ike, Cartman sets Pip on fire as he was sitting just behind him to the the left. However in the previous shots Pip had not been sitting there, some other kid was and wouldn't have had enough time between shots to move.

Continuity: When the boys are first seen in the cafeteria, Stan is in front of Cartman. When Kyle says, "Hey look, there's Wendy Testeburger." in the next shot, Stan is now behind Cartman.

Audio problem: After the scene where Mr. Garrison says, "You can say that again, Mr. Hat," Kyle shouts, "Give me back my brother you stupid aliens" in Stan's voice.

Revealing: When Cartman finishes talking about his nightmare in the beginning, Chef comes and you can see his hat poking out of the roof of the car. They couldn't really fix this because this episode was done out of construction paper.

Continuity: When Jimbo asks the children if they want beer, the campfire stays still for two shots.

Continuity: When Ned, Jimbo and Kenny are out on the fishing boat they have a rocket attached to a rack. After firing the rocket the rack still remains, but in the next shot when they head for shore the rack is gone.

Continuity: How could Ned shoot Kenny by accident when he was unable to shoot Scuzzlebutt because he had run out of ammo?

Deliberate "mistake": When the boys are hunting in the forest, then they start to crawl after the rabbit, however, the background behind them is static as if they were crawling in place.

Plot hole: Scuzzlebutt is trapped by a river of lava but is able to accept thanks from the Mayor. To do this he would had to have crossed a river of lava.

Continuity: The clock behind the geologist shows different times between scenes.