At the end of the movie, the blanket is alternately on/off the baby's head between shots.
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, the Bakers move 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.
Nora's water breaks in the canoe, but her pants stay dry.
After showing Sarah with a makeover, Lorraine's shoes change from flats to heels.
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.
Tom Baker says "Ice Age" (2002) has a G rating; in the US it has a PG rating.
Specialized cinemas and small-town movie houses often re-release older movies, so Ice Age (2002) and Napoleon Dynamite (2004) could be playing simultaneously at such a venue.
In almost every shot, a nude-colored leotard is peeking through Nora's clothes, a sign that she's wearing a fake belly.
When the fathers are log-rolling during the Labor Day cup competition, wires are visible in some shots helping them keep their balance.
When Tom joins Sarah and Eliot for the knee-boarding, after Sarah apologizes for Tom's interrogation Eliot says, "It's OK, 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.
After knee-boarding, Tom gets out of the boat and the two boys both speak, but their mouths never move.
When the Murtaughs are singing during the campout, their lips aren't completely synchronized with the audio.
When Tom Baker comes onto the dock after water-skiing, the kids in the boat are talking to him but their mouths aren't moving.
When Tom, Kyle, and Nigel are leaving to compete for the Labor Day Cup, the leaf netting from the lighting effect is visible on the cabin porch.
In some shots, the boulders and all of the water toys appear to be at least a quarter of a mile across the lake. In other shots, the lake appears to be only several yards wide.
When Tom and Kate come out of the tent in the morning after camping out, you can see the shadow of the boom mic against the rock.
At the end of the movie, the baby is placed in the car seat forward facing. At that age it should be rear facing, otherwise it is dangerous for the child.