Corrected entry: The outside of the Byrnes home in this sequel is different from the home in "Meet The Parents". In the first movie, there are dormer windows on the second floor. In the sequel, the front of the house looks completely different with no dormer windows.
Corrected entry: After the party, when Bernard is lying under the motor home, Jack honks the horn and it does not fully play its music. That cannot be possible.
Corrected entry: When the family is eating at the dinner table, Jack goes on about the reason he uses things like baby monitors and then there is silence. Just before Gregg says, "he's right" look at Bernard Focker's face, he is obviously about to burst out laughing.
Corrected entry: When Jack is about to get out of the shower and he sees Moses and Bernie also in the bathroom and Bernie is sitting on the toilet. If you look at Jack, you can see the dark bathing suit he is wearing. (00:49:40)
Corrected entry: In the scene where Greg gets shot by the taser, there is a shot of the officer and Greg is on the floor, but the cord that is supposedly connected to Greg is very easily seen running off screen in the opposite direction to Greg. Then in the next shot it is running towards Greg. (01:40:10)
Corrected entry: When Greg's dad lies down in front of the bus, to stop Mr. Byrnes from leaving, he calls his son Ben, instead of Greg or Gaylord.
Corrected entry: The hair Jack pulls from Gaylord's co-captain hat is much too long to have come from Gaylord's head.
Corrected entry: When Jack Byrnes places the tiny spy camera in the mouth of the toy alligator, he sets it back far enough that the teeth partially block the view through the lens. He is immediately seen from the spy camera's perspective wiping the lens clean. It would have been necessary to open the alligator's mouth for access but the teeth stay in view without moving.
Corrected entry: When Mr. Jinx uses the toilet and flushes it, Dina says that Jack installed a special device for the cat which is a button. Then when Jinx releases L.J. from his pen, he flicks that little device, which resembles a common toilet flush. If Jinx could have done that, why couldn't he just use a normal flush?
Corrected entry: Jack (De Niro) is super-suspicious and likely to be aware of all the facts about everything that affects his family, yet he did not know that Greg's mother was a sex therapist. Surely once he knew his daughter was to marry into the Focker family, he would have looked into the family's background.
Corrected entry: During the scene where the Focker's are driving to the Byrne's family, another vehicle full of women are driving past. On the side of their vehicle, it says "hoot if your horny". This is a grammatical error. The 'your' should actually be spelled 'you're' as in 'you are'.
Corrected entry: When Jack is threatening Gay with the truth serum syringe, the content in it varies between shots: when the camera looks at Gay, the syringe is empty; when it looks to Jack, the syringe is full.