Continuity mistake: When Annie Wilkes is shaving Paul Sheldon, when she is almost done she stops shaving and talks to him about something briefly. Before she stops talking there is still some shaving cream under his nose. Then when the camera goes back to Sheldon, after she's done talking, there is no shaving cream under his nose.
Character mistake: When Paul is looking through Annie's album, there is an article on her as a nurse. The headline has her name as Annie M. Wilkes. But, in the accompanying photo her name is listed as Annie C. Wilkes.
Continuity mistake: After Annie tells Paul she knows about his superstitions and that there is only one manuscript, when Annie holds the single match and box of Diamond matches, which have a distinctive blue and red top, the matchbox faces the opposite way between the shot facing Paul and the next shot facing Annie. (00:36:05)Super Grover
Continuity mistake: When Buster flies over Annie's house, there's a shot of the house from outside and the roof is covered in snow. The shot from the helicopter, the amount of snow changes, including a couple sections being nearly void of snow. There are also a lot of extra tire tracks. (00:38:00)Bishop73
Continuity mistake: When Annie lifts Paul off the floor and lays him back into the bed, there is initially no tape over the brace on Paul's left knee. In the next shot, which is somewhat bird's eye view, there are three pieces of white tape over the brace, then there are none again when she finishes lying him down.
Continuity mistake: During the rainstorm, it shows snow on the roof of the house. The next shot of the rainstorm still has the same amount of snow on the roof - some should have been washed away.
Factual error: When Paul hits Annie in the head with the 15 pound typewriter, she is only incapacitated for 2 or so seconds and has no bruising or bleeding on her face. One would think a typewriter this heavy would at least cause some type of injury to her face, such as bruising or bleeding to her face and would incapacitate her for longer than 2 few seconds.
Other mistake: When Annie shoots the sheriff in the back, he fall forwards on the staircase where he stood. Annie walks down without moving around the corpse of the sheriff. She just advances forward as if he isn't there.