Continuity mistake: Invasion of the Yokel Snatchers: When Homer and Bart are watching the mall being invaded, there is a fountain visible in the far background, next to the the mall. An alien is peeing in the same fountain beside the mall and mall security arrives. When the shot cuts back to Homer and Bart, we can see they are suddenly much closer to the water fountain.
Continuity mistake: Bargain Bin: When the mothership turns away from the Simpson house, the Simpsons are watching Springfield being destroyed by the aliens. Bart is holding the strategy guide with the spine being faced above the rest of the guide. The shot cuts to an angle from in front of the family, and the spine of the strategy guide is facing below the rest of the guide.
Continuity mistake: Bargain Bin: When the Simpsons arrive in the game engine, they are standing away from the edge and not on the yellow/black markings on the platform. A few seconds later, Homer walks off the edge of the platform, and suddenly, they are on the edge of the platform and on the markings.
Other mistake: Game Over: When the game engine is being destroyed, Private Burns and the skeleton of Otto are exiting the wrong game. Private Burns was a character featured in Medal of Homer, but he is exiting the NeverQuest game and the skeleton of Otto was one of the side villains to destroy in the NeverQuest game, but is exiting the Medal of Homer game.
Continuity mistake: Game Over: Whilst escaping the game engine, Bart points to the portal to Springfield. On the left hand side of the screen is a sign saying "Hot Off QA" on the light fixture for the Medal of Homer game. In the next shot, the A in the sign is suddenly tilted. The light fixture also receives further damage.
Continuity mistake: The Land of Chocolate: When the Simpsons are watching TV, Homer is asleep and his right arm is on the arm rest beside him. The shot cuts to a closer shot of Homer and suddenly part of his arm is now partially on the cabinet beside the couch.
Continuity mistake: The Land of Chocolate: After Homer runs with the three bunnies, he stops and it rains chocolate balls into his hands. As they land in his hand, there are not that many raining, but in the next shot, there is suddenly a large amount, way more than what was shown landing in his hands.
Continuity mistake: The Land of Chocolate: When Homer looks into the window of the Ye Olde Chocolate Shoppe and looks at the half price chocolate, he walks over to the window and stands in the centre of it, but in the next shot, he is suddenly standing at the corner of the window as the window frame is visible beside him.
Continuity mistake: Bartman Begins: After Bart has bought the Grand Theft Scratchy game, he is walking away from the store and Marge finds him. In a close-up shot of Marge gasping, the pearl necklace on Marge's neck is deep orange. In the next shot, as she takes the game off him, the pearl necklace is suddenly a much lighter orange.
Continuity mistake: Bartman Begins: After Principal Skinner reveals his plans to Bart, Homer tells him "I've never heard of such an evil plan. You're like if the iron sheik had baby with Rowdy Roddy Piper times a billion." Whilst Homer is saying the line, he has Kearney and Dolph in a headlock and Kearney and Dolph are looking at each other, but in the next shot, Kearney and Dolph are suddenly looking at Principal Skinner.
Continuity mistake: Lisa the Tree Hugger: When Mr. Burns is talking to Smithers about his tree cutting plan, there is an overview shot where his right arm is near the edge of the mat on the table. The shot cuts to a closer shot of Burns and his arms are now near the middle of the mat.
Continuity mistake: Mob Rules: When Martin runs out of the video game store, there is a line of people queueing outside. A couple of seconds later, as Marge and Lisa watch Martin throw Ned out of his car, the video game store is visible in the background, and the queue has vanished.
Continuity mistake: Mob Rules: When Martin Prince carjacks Ned, the shot of Ned being thrown out of the car shows the car having a shadow. The shot changes to an overview angle of Martin driving away, and the car's shadow has vanished.
Continuity mistake: Mob Rules: As Martin Prince runs onto the road, Maggie is in her baby carrier looking forward. The shot cuts to Marge and Lisa watching Ned getting carjacked, and Maggie is suddenly looking behind her, watching the carjacking.
Continuity mistake: Mob Rules: After Ned has been carjacked, Marge and Lisa run out to help him. An Itchy and Scratchy billboard is on their right, but by the next shot, the Itchy and Scratchy billboard is behind them.
Continuity mistake: Mob Rules: When Ned has been carjacked, just as Marge and Lisa go over to him, there is a lamp post on the street corner, but as Marge asks Ned if he's hurt, the lamp post has vanished.
Revealing mistake: Mob Rules: When Mayor Quimby and the games producer are in the hot tub, the two of them are holding glasses filled with wine, but the wine always remains in fixed position, even if the glasses are being tilted to the side.
Continuity mistake: Mob Rules: When Mayor Quimby and the games producer first see the mob, there is a senator standing near the front. Grandpa Simpson is in the crowd behind the senator to her left. The shot cuts to a closer shot of the senator, and Grandpa Simpson is now directly behind her.
Audio problem: Mob Rules: After Mayor Quimby bans Grand Theft Scratchy for minors, the mob is heard cheering, but none of their lips are moving with the cheers.
Audio problem: Mob Rules: When the Simpsons are at the breakfast table talking about their powers, Homer says "That was the greatest day of my life", but his mouth is both out-of-sync when he is speaking the second half of the line and his mouth also stops moving before he finishes.
