Visible crew/equipment: About half way through there is a shot that shows Jonathan sitting in his living room. On the right-hand side of the screen we can see the windows and it's dark outside. Even so, you can see a cameraman holding a camera moving along the window filming Jon from behind.
Continuity mistake: When John first meets Raymond, Raymond sticks his business card in the black slot and it is big enough that it hangs over the slot. When the camera pans away from the card to go back to their conversation, it disappears. At the end of the scene it appears again, because they end on a close-up of the card.
Continuity mistake: Also when John is driving to work to review the tapes, the camera is following an SUV through the intersection which implies they are following his vehicle. That vehicle is a Honda CRV, but when he swerves to miss the oncoming car, the vehicle switches back to a Ford Explorer.
Continuity mistake: When Keaton is watching Anna take his son to school he is standing in the driveway. During the first shot his cell phone is on a clip on the side of his pants. When the shot changes to Anna in the car, then back to Keaton, his cell phone has moved to the front from the side.
Continuity mistake: After Jonathan saves the baby from the car he goes to the funeral. In the funeral he starts talking to the baby's father and while they are talking you see a bald man with glasses pass by and glance at the baby and then in another scene you see the same bald guy pass again.
Continuity mistake: When we see Anna as a 'ghost,' she is wearing a flowing, lightly colored garment, NOT what she was wearing when she died. But when we see John's ghost, he's wearing the clothes he died in, as you can assume most of the others were as they seemed to be wearing casual garments. The killer (as you could see with his last attempted victim) did not change his victims' clothing before killing them. Why then, was Anna wearing what seemed to be a night gown?