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.
When Tyler takes off the helmet that has been on his head for a long time, his hair is sticking up all over the place, but when he is riding the ostrich, his hair looks neatly brushed, and Lauren was in the bathroom the whole time, so she couldn't have brushed it, and Jim wouldn't think to do it.
When Adam Sandler and Drew Barrymore are coming back from their massage they are wearing robes. The youngest daughter wants Drew to tuck her in. While tucking her in Drew is now wearing a blue outfit and when she leaves the tent Adam is wearing sweats.
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.
The goof item below may give away important plot points.
When Lauren and Jen are talking while working on the closet after Lauren's return from Africa, one of the pairs of shoes on the shelf,that Jen is arranging, change from neat to untidy to neat, back to untidy and then back to neat again.
When Jen and Lauren are talking in the closet after Lauren returns from Africa, Jen is arranging shoes on the shelf. She already puts both the last pair of shoes. But in the next shot she puts them on the shelf again before she attends her call.
Toward the end of the movie when Lauren returns from running errands and Mark gives her the flowers that Jim left, the scene shows Mark hand them to her, then the next scene shows Lauren asking Mark, "you brought me flowers?" with her holding the flowers. The next scene pans back to Mark answering her and he is holding the flowers again. Then the next scene is back to Lauren and she is holding the flowers.