When Alison and Miss Logan are going up the stairs for the first time, there is a picture on the wall that is clearly not set horizontally, but in the next shot, it's different.

(at around 36 mins) While Allison and the landlady are having coffee, the coffee cup is in the landlady's hand, then when the camera changes angles it's on the table, then back in her hand when the camera angle goes back.

Alison wakes up in her new apartment, enters another room which is dark, but in the very next shot it's full of lights.

Alison sees the cat eating a bird, but in the next shot bird looks torn while being almost undamaged in the first shot.

When Alison calls Brenner's office in the phone booth, a freighter can be seen entering into the shot in the background. When she hangs up a few seconds later, the freighter is gone.

When Alison is filming the wine commercial, she does 14 takes and the last one is good. A production guy appears out of nowhere and using a tape measure, comments, "It's out of focus." This would not have been the case as the bottle was placed in the same spot for all of the previous takes and apparently in focus.

(at around 4 mins) When Allison is filming a shampoo commercial, she and another model are seen whipping their hair around. The footage was reversed, so the actresses' hair is moving backwards.

When Allison stabs her father's ghost in the eye, the close-up of the knife cutting through the fake head's eye socket reveals the seams of the replaceable make-up appliance that made re-takes of this effect possible.

When ghostly neighbor Malcolm Stinnett's face begins to spontaneously bleed during the film's climax, the tube pumping the blood under the forehead appliance is visible on the top of his head.

When Michael's delivers his ghostly monologue to Allison and his face begins to split open, the monofilament wires that are being pulled from off-camera to create the cracks in his face are visible. Also, actor Chris Sarandon blinks as if startled when the wires are pulled on.

When the corpse in the junked car is first shown, the eyelid of the eye without makeup flutters.

Just before the climactic mid-July night begins, Michael views a magazine ad that used a photo of Alison with two dogs in front of a pool (which was taken just before her first fainting spell shortly after moving to Brooklyn Heights). The cover of that magazine reveals a publication date in early June, but by mid-July, Alison has only been in her new apartment for at most three or four weeks. Thus, the pool photo could not possibly be in a magazine dated in early June.

(at around 9 mins) As the hearse passes, the camera crew and lighting equipment are reflected in the car's side.