Continuity mistake: When Kenny approaches his mum with a plunger, she asks, "What are you doing Kenny?" and she is wearing a "I'm with Stupid" t-shirt, but when Kenny tries to plunge her, the phrase "God Bless America" can be seen visible on her T-Shirt.
Cartman's Silly Hate Crime 2000 - S4-E2
Continuity mistake: In the scene where Cartman is crying for his mother, the tattoo on Romper Stomper's face disappears, then comes back in the next scene.
Continuity mistake: In the beginning when the boys come in to the living room, Kenny's brother and Stan's sister Shelley is standing next to him. When it cuts, as Stan's grandpa enters, they're gone.
Continuity mistake: When the boys are heading to see the quintuplets they approach a souvenir stand. In the wide shot all we can see are some CDs on the stand. In the close-up shot there are suddenly prize signs next to the CDs.
Cartman's Silly Hate Crime 2000 - S4-E2
Continuity mistake: In Mackey's office, Cartman goes from getting off his chair, then sitting back on the chair, then he appears back off the chair.
A Very Crappy Christmas - S4-E17
Continuity mistake: Cartman is already on stage, but in the next shot, he arrives, and Stan and Kyle ask him what he's doing there. (00:16:58)
Cartman's Silly Hate Crime 2000 - S4-E2
Factual error: The news anchor calls Cartman a hate crime suspect, but he had already been convicted, that makes him a hate crime convict.
Audio problem: Just before Kenny explodes from eating all of Mr. Broflovski's antacid tablets, we hear Kyle, Stan and Cartman shout out Kenny's name. One problem - Cartman isn't in the room with them. He isn't even on their debate team. (00:10:35)
Suggested correction: This is incorrect. Only Kyle and Stan's voices are heard shouting Kenny's name. Cartman's voice is not in there. Replay this part on loop; you won't hear it.
Continuity mistake: Pocket carries Pip's luggage away, but a few shots later the luggage suddenly reappears beside them.
Cartman's Silly Hate Crime 2000 - S4-E2
Continuity mistake: At first the sled race is supposed to be on Saturday, but late in the show it is on announced as happening on Thursday.
A Very Crappy Christmas - S4-E17
Audio problem: The animated Christmas movie the boys are making is really "the Spirit of Christmas", the movie Trey Parker and Matt Stone made before South Park. The dialogue recorded by the boys is the same as in the original (with a few changes, but when the film is shown later it's the original speech from "The Spirit of Christmas". You can tell by the way the voices are done, and the tone of the voices.
The Tooth Fairy's TATS 2000 - S4-E1
Other mistake: Cartman is excited because the "tooth fairy" left him two dollars in exchange for a tooth. When he holds up the two bills, they are identical. Both have the same serial number.
Continuity mistake: There is a scene where the FBI show up to the North American Marlon Brando Look Alikes meeting by mistake. However, during a close up of the leader's (the geneticist's) face, you can see the bottom of the banner actually says "Man Boy Love", as in the other NAMBLA. (00:16:20)
Something You Can Do With Your Finger (a.k.a. Fingerbang) - S4-E8
Continuity mistake: When Cartman goes to see the mall manager for the second time, the doors close behind him. Two shots later, the doors are suddenly open, then go back to closed two more shots later. (00:13:10)
Something You Can Do With Your Finger (a.k.a. Fingerbang) - S4-E8
Audio problem: After the first group of people run to buy an orange smoothie, when the security guard says, "Jesus, they're gonna start a riot," his mouth never lip-syncs the word "riot." (00:08:28)
Something You Can Do With Your Finger (a.k.a. Fingerbang) - S4-E8
Continuity mistake: When the Marsh family is having dinner, Stan's cup and knife repeatedly vanish and reappear between shots. Shelley's cup and knife also vanish in her close-up. (00:02:50 - 00:03:14)
A Very Crappy Christmas - S4-E17
Continuity mistake: When Kyle tells Mr. Hankey and his family about the $300 he got for the animated Christmas card, the olive stick in the wife's martini glass is facing to the right. When she says to Mr. Hankey "That's not the only thing we've got to get working again if you know what I mean", the olive stick in the martini glass is now facing to the left. The olive stick then returns to facing to the right for the remainder of the scene. (00:07:50)
