Continuity mistake: When Kurt is driving Ed to work, trying to persuade him to work for Mondo Burger, Ed starts the conversation with a dent in the front of his hat. Later on in the same conversation, the dent disappears and later reappears in a different spot on the hat. (00:43:05)
Other mistake: When Dexter, Ed, and Otis are in the insane asylum, watch Otis's lips as Dexter says, "That means we only got 4 hours to warn 'em." He is mouthing along with Dexter's line. (01:07:00)
Deliberate mistake: As the Mondo Burger building is falling apart, customers and employees run out the doors. The glass doors then shatter. Not only do they break at the exact same time, there was nothing to make the windows shatter as hard as they did. (01:25:51)
Audio problem: As they are running away in the ice cream truck, Ed turns on the jingle and starts dancing. Dexter gets annoyed and turns the jingle off, but the music stops about a second before he hits the button.
Other mistake: When Dexter is explaining the contract to Ed, Ed pulls out a pen and clicks it. In the next camera angle, Dexter hands him a pen.
Continuity mistake: When Ed is skating through the park and the baby gets mixed up with the players, they throw the baby through the hoop. If you watch, the man who threw the baby through the hoop doesn't have sleeves, but when it shows the baby being caught, the catcher has sleeves. Then it goes back to the person who supposedly caught him, but he has no sleeves again.
Continuity mistake: At the start, the teacher is in the room, then in the next shot, when Dexter walks out of the room, the teacher comes in.
Continuity mistake: When Ed drives into Dexter's teacher's mailbox, he throws all his letters into the air. In next shot, he still has one in hand.
Other mistake: In the scene where Dexter is telling his teacher he can fix the car damage; you see about four teens walking home from school in the background. One of them waves at the camera twice and then walks away.
Revealing mistake: When Ed and Dexter are in the ventilation shaft, watch when they fall in the trolley thing. If you look carefully you can see Ed's wig hanging on the edge. It's got a good burger hat on it.
Continuity mistake: When Dexter tells Ed at the end to count to ten, between shots, a yellow light is on his face, and then it isn't.
Continuity mistake: When Ed tries to fix the Good Shake machine, it's pink, but the rest of the film, it's red.
Continuity mistake: In the scene near the end of the movie, where Ed and Dexter are about to sneak into Mondo Burger to steal the chemical, when they hide behind the moving Frito-Lay truck they are still in the uniforms from Demented Hills, but in the next shot when they sneak around the corner, they are back in their Good Burger uniforms. And you never see the Demented Hills clothes again.
Suggested correction: They have their good burger uniforms on the whole time, they never changed outfits.
Continuity mistake: When Dexter is trying out for Mondo Burger and Kurt says to take out the trash, the guy behind Dexter moves closer to him between shots.
Other mistake: When Kurt is putting the shark poison in the sauce look at the color of the poison, it keeps changing colors.
Continuity mistake: When Dexter's friend runs out of the car after hitting the teacher's car, he is close to the car. In the next shot, he isn't close. In the third shot, he is again close to the car.
Continuity mistake: When the guy says that he can't wait for Mondo Burger to open, the guy is nodding his head, but in the next shot he isn't.
Continuity mistake: When Ed is throwing cups of ice cream they stick to the window but in the next shot they aren't there.
Continuity mistake: When Dexter and Monique walk away once they've kissed each other, you don't see Ed and his date, but in the next shot of them, they're right by the Good Burger door, which they weren't before.
Visible crew/equipment: When Kurt is yelling at Dexter for whispering something, you can see a stage light in the reflection of the trash can as he walks behind him.
