Audio problem: When Teeny and Sam are on the swings, talking with Chrissy and Roberta, a few lines of Teeny and Sam's dialouge is either out of sync or completely dubbed with/over their lip movements. Also, in one shot Teeny is heard laughing, yet her mouth is closed tight. (00:08:45 - 00:10:15)
Other mistake: When the girls are in the diner and Chrissy is counting money, you see a picture of the tree house in a tree, it is the same tree as the one the girls use after they buy the tree house.
Continuity mistake: When the girls ride away and scatter the boys' clothes on the ground, a truck is visible on the road in the background. When the boys run after the girls, the truck is gone.