The blowup doll is missing from the car in the overhead shot of Lazlo and Charlotte driving, but it reappears in the next shot.
Charlotte is cut on the face in the cornfield. The cut vanishes when Lazlo finds her.
Lazlo is blowing into the doll in one shot of the driving car, but it's suddenly in the backseat in the next shot.
When Jacob is stabbed his arms are tied,later when Allison finds him laying in the barn the rope is gone.
When the out of towners "just miss" the 8:00pm bus out of town, the sun is much too high for it to be that late in the evening.
When the two firemen try to put out the fire in the silo, their clothing burns, yet firemen wore flame-proof jackets at the time the film is set.
Eva Mendes has her name spelled wrong in the credits as "Eva Mendez" instead.
At 1:09:49 You can clearly see that the chainsaw has no chain.
At 13:30 he cuts the man with an axe. You see blood on his face, but not on the axe.
At1:09:25 the man chops with an axe. He cuts with an axe two more times & then reaches through & unlocks the door. He didn't need to chop several times. He could just unlock it himself.
At 1:04:34 You can see the equipment used to create the smoke and the flames from the silo.