Continuity mistake: As Ben and Jane drive down the road, it is raining. After they hit the ghost, the scene fades to black. When the scene fades back in, it's heavily snowing, and a previously nonexistent thick sheet of snow is covering the ground. As they get out of the car, they start talking. During their conversation, there is a quick cut, and with this, it instantly stops snowing.
Continuity mistake: Jane brings her photos to the magazine guy who "knows" ghost photos. While she is waiting to talk to him, you see a gentleman working on a photo; he is adding a ghost face to it. The first time you see the screen, he moves the face into the top right corner. The shot cuts to Jane and then back to the gentleman, and now the face is in the middle of the photo and he is again moving it to the top right corner.