When Tom is introduced to Nora's baby, he walks into the room and the camera zooms into his face. In the very next shot, the room is filled with the Bakers and Murtaughs, as though they had been there the whole time.
After Nora's water breaks, there is a cut to the Murtaugh family discussing whether the Bakers are playing a trick to win the race. In the background, you can see the Bakers moving off to the left side of the screen, paddling quickly. When it cuts back to the Bakers, the family is stationary in the middle of the lake, still freaking out about Nora's water breaking. Then they discuss their options, and start paddling to the side of the lake.
When Kate Baker gets orange juice dumped all over her, the shirt is absolutely drenched. When they cut back to her walking off to get a new shirt with Sarina Murtaugh, there is barely any orange juice on her, with the exception of a small amount around her stomach.
During the contest at the end, each family's score is displayed on a large board. When the tie-breaker is being discussed, the scores are gone. When the group leaves for the canoe race, the scores have returned.
When the dog bounds underneath the long dining table, in following shots the remaining shattered glass and china changes position and amount, and the cloths, plates etc. all change position as they lay on the table.
When Mr Murtaugh and his wife are saying goodbye to the Bakers after the party, Mrs Murtaugh is dirty and her hair is tousled and covered in grass. The scene in which this happened, in which the dog pushed her down a hill, was cut.
After Tom reveals Sarah's interest in Elliot, when Lorraine walks by vowing never to help Sarah again, Bud holds a burger in his right hand and a plate with a hot dog on it in his left. Next shot he's eating a hot dog with his right hand, while holding a burger with his left.
When Anne is scared by Charlie, in the gazebo, she dries herself off with a towel, throws it to the floor then she dresses, and they walk to the bench. In the next shot you can see the towel is now hanging up over the side of the gazebo.
When the Bakers and the Murtaughs are having the campfire singing contest, Tom is looking across the lake at the Murtaughs and his hair is slightly messy. When he turns back to his family in the next shot, his hair is neatly combed.
When Tom is knee-boarding, just after he goes over the ramp, Sarah asks Elliot what his favorite subject is, after a cut to Tom in the water there is a side-on shot of the boat with Tom behind it. In this shot Sarah and Elliot are not in the boat.
When Charlie and Lorraine arrive at the house and other family members go down the stairs to greet them, Kyle and Nigel (both wearing blue) are on the veranda. In the next long-shot of the house, Kyle and Nigel are nowhere to be seen, then both reappear in the next shot. Also, Jake and Mike are seen beginning to descend down the stairs twice between shots.
When Tom joins Sarah and Elliot for the knee-boarding, after Sarah apologizes for Tom's interrogation Eliot says, "It's okay, my dad would've done the same thing." Two shots later, as Tom grunts in the water, this shot is flipped - the driver is now on the left and the kids switched sides.