Corrected entry: In the scene where Greg is getting acquainted with Pam's parents, Jack asks him what kind of car he's driving, and Greg tells him it's a Taurus. However, minutes before, as they drove in, you could see the back of the car and it was clearly a Ford Contour, not a Taurus.
Corrected entry: Robert DeNiro is explaining that the cameras in the teddy bear and the decorative artifact are motion-activated. Shortly after, Ben Stiller waves his hand in front of the bear, which should have activated the camera. When they cut to DeNiro again, the image on the TV screen should've been from the bear camera, but wasn't. DeNiro's position in the next shot suggests he had been still at the time, and wouldn't have set off the other camera.
Corrected entry: When Greg is on the plane trying to fit his luggage into the overhead compartment, there is clearly someone sitting in the seat in front of him. At the same time, there is a young guy trying to get by. After Greg asks him where the fire is, he decides to take a seat. But he chooses the row right in front of Greg, which in the previous shot was clearly taken already.
Corrected entry: When everyone first arrives at Kevin's house, Pam says to Greg, "I was sure I told you, Kevin is Bob's best man, this is his place." But Pam didn't know that it was Kevin's house until they arrived there, so she could not have been sure that she had told him.
Corrected entry: Jack shouldn't know that the fake Jinx's tail had to be spray-painted. While he can obviously smell the spray paint, he never saw the fake cat before, so there is no way he could have known that the cat's tail looked different from the real Jinx's.
Corrected entry: In the scene when Stiller is on the plane at 2 in the morning, when the stewardess is trying to get him to check the bag, he says (in so many words) that she can try to get the bag from his "Kung Fu grip." Right when he says that, look to the left part of the screen. There is a guy in the back row that has to duck his head because he cracks up.
Corrected entry: Jack accuses Greg of spray-painting the shelter cat's tail to make him look like Mr. Jinx, but there's no way Jack could have known that Greg went to a shelter and found a cat with a white-tipped tail.
Corrected entry: When Kevin is about to show Pam and Greg the wedding altar he made, he pulls a tarp off and states that he just put a fresh coat of lacquer on it that morning. With the wedding coming up, why would he cover it with a tarp and prevent it from drying properly? The tarp couldn't really be for secrecy's sake, as it's doubtful anyone would've gone into that room anyway without Kevin guiding them there.
Corrected entry: When the cat first makes an appearance, it is called Dixie. Throughout the rest of the film it is called Mr. Jinks. (There was an old cartoon, The Huckleberry Hound Show, where two mice, Pixie and Dixie, and a cat called Mr. Jinks were featured. This must have been pointed out to the filmmakers during shooting, and they decided to change the cat's name from Dixie to Mr. Jinks.)
Corrected entry: In the scene where Greg is on the roof and Jack is speaking Thai, Greg dives to stop Jinx from jumping. Then it shows a wide view and it's normal, but when everyone comes out to see the fire, Greg dives on a little roof that wasn't there before.
Corrected entry: Greg is calling for Jinx in the car, and there is no reason for him to do it because even if the cat could hear him over the sound of the car, the windows are rolled up.
Corrected entry: When Greg is leaving to go to the airport, he's wearing what appear to be the same clothes he was wearing when he and Pam first arrived in New York. When he's waiting to board the plane at the airport, his shirt has changed.
Corrected entry: During the "race" scene, there is a right turn arrow painted on the pavement in Jack's lane at the second stop light. When they pull away, the right turn lane arrow is no longer there.
Corrected entry: In the scene at the dinner table when De Niro asks Greg to say grace, De Niro has an empty plate and his hands on the table. It alternates between shots of the other people at the table and when it shows De Niro again, he is handing Greg a bowl of food, then it goes back to him with an empty plate.
Corrected entry: In the water volleyball scene at Kevin's you notice that Focker's side is walking around in the pool, but in the background you see a diving board...since when do you dive in three feet of water?
Corrected entry: When Stiller spikes the ball, it hits Pam's sister on the top of her head but there is blood coming from her nose.
Corrected entry: When Ben Stiller meets Mr. Jinx on the bathroom while peeing the toilet seat is up, at the end of the movie when De Niro is watching the camera tape records he watches Stiller lifting the seat before peeing. That happened the same night and he never went to the bathroom earlier and Jinxy has no thumbs.
Corrected entry: Near the end of the film when Focker is accusing Pam's father of still being in the CIA, he says that he heard him speaking fluent Thai on the phone. How would he have known it was Thai? Having heard that her father spent 19 months in a Viet Cong POW camp, don't you think he would have at least assumed it was Vietnamese he was speaking?
Corrected entry: When Jack (De Niro) and Greg (Stiller) are racing home from the rehearsal dinner Greg is driving a Mercedes Benz. Each stoplight on the way home he stops to screeching tires. Mercedes Benz has had anti-lock brakes on their cars for many years. It would be virtually impossible to do this in this type of car.
Corrected entry: When Greg is waiting to board the plane at the airport, there's no one else waiting with him. When he's dragged out after his outburst on the plane, the gate is full of people.
Corrected entry: In the scene when Greg is smoking on the roof, he hears Pam's dad speaking fluent Thai on the telephone. Thai is a tonal language, so each sound has a different meaning depending on its tone. Pam's dad is speaking in a monotone voice, so there is no way the person on the other end of the line would have understood him.
Corrected entry: When Pam is explaining to Greg why she and Kevin have Top Gun nicknames for each other, she says it's because Top Gun was a very popular movie when she and Kevin dated. Top Gun came out in 1986, so Pam and Kevin couldn't have been any more than about 10 or 12 years old at the time.
Corrected entry: In the beginning of the movie, Greg and Pam get on a plane in order to travel to Pam's parents' house, but they eventually arrive there in Greg's car.
Corrected entry: Greg is going to use the bathroom, but discovers Mr. Jinx on the toilet. He switches off the bathroom light and leaves. However, the light switch is already in the "off" or down position. Furthermore, when Greg "turns off" the light, he just touches the switch, not flick it, but we hear the "click" sound effect and the light goes out anyway.