(at around 9 mins) When George gets on the bus and his head gets stuck in the bus door, he loses his cap. In the next shot of him, his cap is back on his head.
(at around 18 mins) In the rap club, Simon Cowell's drink disappears from the table (in a deleted scene it is revealed that Simon gives the drink back).
(at around 1h 6 mins) When the President drives up to Logan's farm, he runs over two aliens. He pulls two $10 bills out of his wallet to place on the body, but in the next shot when he places the bills on the alien, the bills have changed to $20 bills. In the following shot, the money is gone completely.
(at around 48 mins) The glass of the oil lamp Tom holds changes from clear to darkened with smoke to clear.
(at around 48 mins) Pictures/drawings tacked to Sue's bedroom door disappear as Tom enters.
(at around 51 mins) When Cindy and the TV boss are fighting on the prompter, none of them would be able to properly type on the prompter since there would be too much force from the other person trying to stop them.
(at around 3 mins) In one scene Becca rips of her shirt, showing her bra, and throws it towards the parrot. At the next scene she suddenly has all her clothes on. However at the start of that scene, as she comes up the stairs, she is seen buttoning a (presumably) new shirt.
During the fight with Michael Jackson, the toys at the window change positions in the next shot. However, it could have been a ghost suddenly moving them.
(at around 26 mins) When Brenda is fighting Tabitha in her living room, the first time Tabitha's knocked down you can briefly see where her costume/make-up stops on her legs.
Obvious stand in when Simon Cowell gets shot.
(at around 14 mins) When Father Muldoon comes over to babysit Cody, he pulls a wine bottle and two candlesticks from his coat. He lights both candles, but in the next shot only one is lit.
(at around 39 mins) When CJ is hitting people with paint, his paint ball gun doesn't have a hopper on it, therefore couldn't fire more than at most twice.
(at around 1h 5 mins) When Mahalik hands the shovel to Tom, Cody can be seen already starting to roll for when the shovel hits him.
When Cindy tells Cody about how he was born. Cody's face on camera doesn't match when angle changes to show Cindy's face, back & forth.
George takes the bus to go pick up his niece from school. Or put another way, Tom makes George take the bus.
(at around 12 mins) When Cody says 'She wants to kill you', we hear this, but his mouth is saying 'I want to kill you'
(at around 55 mins) When Cindy is in the room with the televisions, and the old man hurts her eye with a laser pointer, she says something but her mouth doesn't move.
(at around 3 mins) When Becca fights with the refrigerator, the reflection of a hand pushing the refrigerator's door from the inside can be seen on the window.
When Cindy enters the Oracle's room and hits the post with the vase kept on it, in the next shot a hand is visible at the bottom, supporting the post.
(at around 13 mins) After the school scene Cindy drives off without Cody. When Cody flies after Cindy's car hits him, you could briefly see Cody being pulled up off the street by a rope.
(at around 9 mins) When the bus pulls away after George's head gets stuck in it, a reflector is reflected in the bus doors.
(at around 12 mins) Just after George leaves the classroom after picking up his niece, and the pens are thrown at the door, there is an arm throwing the pens and it is obviously not one of the kids, as just after that Brenda looks in the opposite direction (to the middle of the room) when she asks who threw them.
(at around 4 mins) They say that Middleburg, Virginia is only 20 miles west of Washington, DC. It is actually about 42 miles outside of DC.
(at around 53 mins) Cindy's Map Finder has the map of Maryland reversed putting Ocean City in the Chesapeake Bay. Ocean City is in fact along the east coastline of Maryland, not in the Chesapeake Bay.
(at around 15 mins) On their way into the rap battle, Cindy and Brenda walk through a metal detector. There is also an X-Ray machine to their right, apparently scanning for weapons. Despite this, every patron inside the club is carrying a pistol.
(Around 18 mins in) Before the rap battle is going to begin, Mahalik and CJ talk about how George needs a hype man. And Mahalik makes it sound like that is going to be CJ. Neither does it. Mahalik introduces George like he did everyone else and CJ is off stage.