Continuity: It is raining when Ben and Jane drive down the road. When they hit the ghost, the scene fades to black. When the scene fades back in, it's snowing heavily, and a thick sheet of snow covers the ground. They start talking as they get out of the car, and the snow stops.
Revealing mistakes: When Ben and his wife take a picture of themselves in the beginning, the camera is obviously not on.
Factual errors: While in the honeymoon cabin, the camera Ben is using is clearly a medium format camera. Later however, when they are looking at the pictures Seiko dropped off, the negatives attached to the envelope are 35mm negatives.