Continuity: Annie tells Paul she got the typewriter because it has no "N"; in one of the first scenes where he's typing, there is clearly an "n" in his writing, at the end of the movie, there is no "n".
Continuity: The soup changes from red to orange when Annie throws it on Paul.
Continuity: The typewriter lands upside down after Paul hits Annie with it, yet appears in the next shot right side up.
Continuity: In the scene where Paul gets the knife, an exterior shot of Annie's house is shown and her Jeep is already parked next to the house, even though in a later shot her headlights flash through Paul's window as Annie pulls up to her house.
Continuity: Near the end, when Paul fights Annie he makes her bleed by putting his fingers in her eyes but in the next shot when she's on the floor after he has punched her, there is no blood under her eyes.
Audio/visual unsynchronized: When Paul takes the knife out of his arm sling there is the sound of the knife brushing against metal.
Continuity: The Sheriff places a Post-it note about Paul Sheldon on his board and the note is seen in three different spots over the course of three consecutive shots.
Continuity: When Paul types "what else was there...?", it is on one line in the close-up but two separate lines when he writes "The End".
Revealing mistakes: There is an obvious "dummy" in Annie's place in the climactic fight scene with the typewriter.
Errors made by characters (possibly deliberate errors by the filmmakers): When Paul is looking at Annie's scrapbook, her name in one of the news headlines reads "Anne M. Wilkes," but the accompanying photo gives her name as "Anne C. Wilkes."
Revealing mistakes: In the scrapbook paragraphs in many of the clippings are repeated several times.
Audio/visual unsynchronized: Near the end, when Sheldon mistakenly thinks he has killed Annie, he crawls through the doorway over the broken champagne glass. However, we hear no sound of the broken glass dragging across the floor.
Continuity: When Annie is shaving Paul's face, the areas of shaving cream change without anyone altering them.
Crew or equipment visible: When Paul is in the kitchen for the first time, a crewmember is reflected in the corner of the stove, during the close-up of the knives.
Factual errors: Twice Paul Sheldon's car is referred to as a 1965 Ford Mustang, but the car he actually drives is a 1966.
Continuity: When burning book gets out of control, a flaming bit of paper wafts up to the curtains and starts burning them, yet Annie never notices or puts it out. Later the curtains are just fine.
Continuity: After the search in the snow slope where he fails to see the overturned car, Buster comes back to his car there is a lot less snow on the road.
Continuity: When Annie shoots the Sheriff toward the end of the movie, he falls down the stairs, face first, and stops partway down. However, Annie immediately begins to speak to Paul and heads down the steps, walking where the corpse would have been. There's also no blood left behind from the gaping wound in his chest.
Continuity: During the diner date the camera shot shows the penguin figurine to be facing outward. Paul put him back facing in while exploring three scenes earlier.