When Jim and Lauren are dining in Africa, Lauren's beer glass empties to less than half between two shots.
When Lauren picks up the blue box of tampons, it's a small box not much bigger than her hands, but when she gives the box to the check out clerk, who is much larger than Lauren, it's a much larger box, way larger than the clerk's hands.
At the little league game near the end of the movie, Jen has a brown smudge of chocolate or sauce on her cheek. It changes between shots.
The amount and size of the French onion soup stain on Lauren's shirt changes in alternating shots.
When Jim and Lauren swap back their cards (at around 31 mins) she gives him back her card (the gold one he arrived at he door with) and Jim gives Lauren his card.
Dick's Sporting Goods employees have never worn logo shirts.
When Lauren is parasailing, the long distance shots show a stunt woman and the parachute lines are angled backwards. In close ups of Drew Barrymore, the parachute lines are straight up and down and the lines leading from her harness down to the Land Rover are slack. The close ups must have been shot with Drew Barrymore suspended from the ceiling while a wind machine is blowing.
When they are sitting at the buffet for the first time, the microphone the guy on stage is holding is plugged into an XLR to 1/4" adapter so it has no way of transmitting a signal.
When a boy briefly talks to 'Larry' at the teen disco, his dialogue doesn't match his mouth.
During the ostrich rides, the bystanders are fake clapping.
All of the cars in "New Jersey" had Connecticut license plates.
A South African refers to the Land Rover running out of gas and going to gas station. He would not use these terms in South Africa; he would have called it petrol and petrol station.