Continuity mistake: In the raft scene the boy at the front right, from his view, is kneeling on his left leg. When the camera cuts behind them he's suddenly kneeling on his right leg and remains on this leg through every other angle.
Continuity mistake: The amount of foam and shampoo in the blonde girl's hair in the outdoor shower is inconsistent throughout the entire scene between all camera angles.
Continuity mistake: In the raft scene, when the caretaker slashes his first victim his hedge cutters get stuck in a tree branch and we seem them covered in blood, but then when he pulls them out and raises them into the air to stab his second victim they're clean and shiny.
Continuity mistake: When the black doctor convinces the white doctor to view the caretaker's burn in the hospital, the white doctor's tie goes from crooked around his neck to straight between shots.
Continuity mistake: Near the beginning of the film, Alfred freaks out when he sees Cropsy come up to the cabin window. On the DVD, Cropsy's face is seen as just dark and disfigured. However at the end of the film at the abandoned mine, you see that Cropsy's face has dramatically changed from being just disfigured to having more of a melted appearance.
Continuity mistake: When the girl takes off her clothes to go skinny dipping, the scene where she enters the water for the first time, her hair is already wet from a previous take of the scene.