Continuity mistake: During the fondue dinner, not only do the positions of the fondue skewers change in consecutive shots throughout the meal, in some consecutive shots there are three skewers, then four, then three and so on, resting in the fondue pot, depending on camera angle - not due to people touching them. (00:38:25)
Continuity mistake: During the fondue dinner, Little Jack is in his crib, which is right next to the table between Dina and Jack. Then in the next couple of shots the crib is gone, it then reappears again at various times with and without LJ. (00:38:30)
Continuity mistake: At the fondue dinner, when Roz says, "Of course not, that's Greg's foreskin," in this shot Dina holds down the album page with her left hand, as she holds the skin over the album. In the next shot facing Jack, Dina drops it and it falls beyond the open page, yet, in the next close-up the piece falls directly on the open page with the photo. (00:46:15)
Continuity mistake: In the foreskin scene Greg grabs the photo album and he and his mom start a tug of war. His mom's wineglass is right next to her arm and then in the next shot it is about a foot away. (00:46:30)
Continuity mistake: During the scene when Gaylord Focker enters the room, while Bernie and Roz have fun with whipped cream, notice the whip cream on Bernie's face. Although the amount of cream would change because Bernie wipes his face, the amount and location of the whipped cream changes, goes back, changes again, and is almost completely different in each shot. Once wiped away, it is highly unlikely that whipped cream would magically reappear in the exact same spot as before, and then disappear again. (00:48:25)
Continuity mistake: In the scene where Greg comes in to his parents bedroom and they are having fun with whipped cream, there are 2 pillar candles by the door. These candles are seen in several of the shots showing Greg. The flames keep going out and relighting, but the candles are too new for the flame to be just dipping out of sight, and besides those sort of candles will often glow near the top when that happens. They must have kept blowing out between takes and the crew kept lighting them. (00:48:40)
Continuity mistake: As they are playing football, when Bernie tackles Jack, you see Jack flying and landing in front of the gate. The left flag/marker is also in front of two trees. After they show everyone running over to Jack on the ground, he is lying way far left of his original position. Now the fence is behind him, the gate is gone, and the left flag is no longer in front of the trees. (00:54:48 - 00:54:56)
Continuity mistake: When everyone goes to town Greg stays behind to babysit. Just before he goes to check on a crying LJ be pauses outside the door and the shot shows a close up of a pair of running shoes that are different than the ones Greg is wearing during the remaining scenes. In the shot by the door, the shoes are light grey and white with a metal plate on the side, however, in the rest of the scenes he has on navy and white running shoes. (01:01:50 - 01:03:00)
Continuity mistake: The pen photos that Jack takes of Jorge do not match the ones shown on the upload screen when he sends them to the CIA, inside of the motor home. When he actually takes the pictures, he does them in rapid succession. Jorge is right in front of of the RV about a foot away and all you can see in the background is the RV since he is standing so close to it. On the uploaded photos, Jorge is at least 5-10 feet away from the RV, up on the sidewalk. He is also now at the end of the RV and the photos show the house across the street in the background. (01:05:25 - 01:16:55)
Continuity mistake: There are two sofas in the Fockers' living room, the large whose back faces the kitchen and small whose back faces the "wall of Gaylord"; their pillows have coordinating large and small floral patterns on both sides. When Greg brings crying LJ into the living room, the three pillows on the small sofa have the small pattern facing out, but after Greg answers the phone call from Roz, Jinxy releases LJ, and in the close-ups of LJ the large pattern faces out. Then, when Greg rushes in with his rum surprise, in the first pan of the empty room the small pattern faces out, yet when LJ sits with his glued hands the large pattern faces out. (01:06:00)
Continuity mistake: The time frame doesn't make sense when the kid glues his hand to the glue bottle. He turns on Scarface, which is nearly over. The Fockers and the Byrnes are still in town shopping and Little Jack smears glue all over his hands. By the time they get home from town, the glue bottle is well stuck to the hands. However, Scarface is still on and still on the last fight scene. (01:06:25 - 01:07:30)
Continuity mistake: When LJ speaks his first word, everyone runs into Roz's office where his crib is. They show it right inside of the door. Jack then blows up at Greg when he learns it is a curse word and calls an immediate family conference. Roz, Bernie and Greg leave the room. When they show the family conference, Little Jack and the crib are now gone. (01:10:55 - 01:12:05)
Continuity mistake: During the scene when Gaylord's dad has just found out that Pam is pregnant, Bernie enters the room with a bottle of champagne. he crosses to the bed whilst removing the wire top of the cork in preparation of removing the cork. Cut to Gaylord and then back to Bernie and he is removing the wire again. (01:12:30)
Continuity mistake: During the party at the Good Times Supper Club, when Jack holds out Dina's wine spritzer, in the shots facing Pam the drink has a deep golden color, but in the shots facing Jack the drink is clear. The straw, lime, etc change as well. (01:21:10)
Continuity mistake: When Jack places Jorge's hair in the test tube, he holds Greg's vial, and the name "Greg" is written with the first "G" beside the stopper. However, in the next shot, when he places the vials into the glass, the name is actually written the opposite way, with the last "G" beside the stopper (this is also seen earlier, when Jack inserts Greg's hair). Tape and handwriting differ as well. (01:23:20)
Continuity mistake: Jack drops the two vials into the Tom Collins glass, while in the bathroom. At the hand-off, when he places the drink on the tray, there are no vials in the glass - there is no ice blocking them from view, just a skewer holding a maraschino cherry, a wedge of lemon, and a straw - no vials. Even Jack can't make the two vials invisible. (01:23:40)
Continuity mistake: When Greg sees Jack in the mirror, Jack has one hand behind his back and yet when Greg looks at Jack directly in front of him, both of Jack's hands are behind his back. (01:25:30)
Continuity mistake: When Bernie is lying in front of the bus to protest Jack leaving, in the first shot his head is directly aligned with the wheel well and his feet are under the license plate. When they show Bernie getting up, he is way out to the right of the bus by a couple of feet. (01:32:11 - 01:32:36)
Continuity mistake: When Jack is leaving the island with LJ, there is a shot with everybody screaming for him to come back and you can see the RV has driven about six feet from Bernie's slippers. Then there's two more shots which takes up about 5-6 seconds with everyone continuing to yell. But afterwards, the RV is only about 2 feet from where it was. (01:35:40)
Continuity mistake: When Bernie tackles Jack, the ball drops at his feet, beside Jack. When the camera cuts away, the ball jumps ten feet away from Jack and Bernie moves away from both of them.
Answer: Muskrat is a "code word" they use to remind Jack to keep his temper under control.
Myridon