During the dinner scene, the penguin figurine that Paul replace facing the wrong direction can be seen facing the right way, even though this is before Annie confronts him about it. However, Annie discovered the misplaced figurine long before this, probably the day it happened. During the hobbling scene, she tells Paul that she knows he's been out of his room twice. It's never explicitly said how she knows about the second time, but likely she discovered that the knife was missing.
When Paul takes the knife out of his arm sling there is the sound of the knife brushing against metal.
When Paul is looking at Annie's scrapbook, her name in one of the news headlines and the body of the article reads "Anne M. Wilkes," but the accompanying photo gives her name as "Annie C. Wilkes."
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.
In the montage of shots indicating Paul's vast progress in the novel, we see a few shots of him writing the same paragraph over and over again, which begins, "for three days and three nights, Misery..." The same line appears again when Paul is typing the final chapter near the end.
The typewriter lands upside down after Paul hits Annie with it, yet appears in the next shot right side up.
In the opening scene when main character drinks champagne and lights a cigarette, you can see a patch of matchbox material glued to his thumb, when he lights a match with his finger.
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".
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.
Near the end, Paul pokes Annie in the eyes and makes her bleed, but in the next shot when she's on the floor, there is no blood under her eyes.
Annie's weight fluctuates from scene to scene. It is especially noticeable when Annie is setting up Paul's writing desk. She is much heavier here than in previous scenes.
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".
After Annie shoots the Sheriff, she leaves his body and Paul in the Basement while she goes to fix Paul something to eat. Paul should have been able to retrieve the Sheriff's gun to defend himself. The Sheriff's gun is visible when he leaves Annie's house and closes his Coat.
Annie tells Paul she needs to leave or she might put bullets in her gun. It is raining heavily. But as Annie walks outside, her hair is already visibly wet. This would indicate the scene was shot repeatedly.
In the overhead shot of Paul's room, while Paul is crawling towards the doorway after the fight, two shadows, each moving at different times, can be seen in the left side of the hallway.
When Buster reads one of the "Dragon Lady" articles in the library, under the picture it says, "...There is a higher justice than that of man, I will be judged by Him." In the close-up shot, the mistake is corrected and now says, "...There is a justice higher than that of man, I will be judged by Him."
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.
In exterior shots of the house, the amount of snow on top of the house never changes, despite several scenes in which it is drenched in rain.
There is an obvious "dummy" in Annie's place in the climactic fight scene with the typewriter.
Although Buster's wife would have missed him after he didn't come back from Annie's house, he never told her where he was going, so it's not unreasonable that for one night, no one went there to look for him.
When Paul Sheldon is going through the "Memory Lane" scrap book of Anne Wilkes, there is a news story of Dec 7, 1984 about "infant deaths returns to hospital nursery ward" at Elridge Hospital. The text is repeated twice after the first 3 paragraphs to fill in the newspaper space.
When Paul tries getting back to his room on time before Annie gets to door (after she has arrived home from the shop), it shows Paul rushing down the hallway from the kitchen in his wheelchair, which seems to take him a long time. However, the camera shows that he seems to be going "back" during each shot. It would not take him that long to get to the writing studio (this is noticeable earlier in the film, when Annie goes to fetch water from the kitchen to put out the fire from the burning manuscript.
Even as the car is completing its violent, tumbling crash and coming to a full stop, its body and wheels are completely covered with a thin, uniform, undisturbed layer of snow.
When Paul tests the powder from the capsule before stashing it in the paper holder, he then pours the powder from each half of the capsule. In reality (and in fact in the shot where he opens the capsule) the powder would only be in one half.
When Annie is shaving Paul's face, the areas of shaving cream change without anyone altering them.
After Paul kills Annie, when she is on the floor and at one point you can see her move a little bit.
(at around 55 mins) Annie helps Paul from his wheelchair into bed. She then offers a pencil and pad of paper to Paul. When the camera is looking up from the bed toward Annie the pencil is in her right hand, the paper in the left. When the camera moves behind Annie and looks over her shoulder, she now has the pencil in her left hand and paper in her right hand.
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.
At the end of the movie, when Paul is talking to his manager, the rose in the vase changes during shots.
When dining with Annie, Paul spills a few drops when pouring wine. The stains are visible, but in the next shot they are gone.
In the scene where Annie kills the sheriff, as she walks down the stairs, there are several close-ups of Paul that show a white box with "Clearly Canadian" (the beverage) written on it. There is a bag covering most of the "Clearly" lettering. The box is located to the right. However, when Annie returns with the gun and needle, the close-ups of Paul show a plain box without a bag.
During the last few minutes inside Annie Wilkes' home, Annie carries a tray from the kitchen to Paul's writing studio. From left to right, the tray has the glass, the Dom Perignon bottle, the match, and the cigarette when she leaves the kitchen, but when she enters the writing studio, the glass is on the right when it should be on the left and the match and the cigarette are on the left when they should be on the right.
When Paul smashes the pig statue into Annie's face, her nose is clearly still intact. Also, no blood comes from her nose at all.
When Bates brings in writing materials, there's a bottle of White-out in the front. In the next shot, the bottle is missing.
Deep footprints are clearly visible as the sheriff starts to climb down the snowy hillside to look for Paul's car; he even steps into at least one of them. Obviously previously-formed footprints from prior camera-takes of this scene.
When Buster flies over in the helicopter, he is high enough over the houses to have a prominent birds eye view. When the helicopter is seen through Annie's window, it is much lower in the sky; there most likely would not be any reason for them to fly this low, given the terrain.
When Marcia Sindell calls Buster up and asks if he has seen or heard anything about Paul Sheldon, he tells her that if he finds anything he will call her right back. Buster wouldn't be able to call her back because she did not give him her phone number, the firm she works for or where she is calling from.
When Paul is looking through Annie's scrapbook, the paragraphs of the newspaper clippings are repeated several times.
Near the end, when Paul crawls through the doorway over the broken champagne glass, there is no sound of the broken glass dragging across the floor.
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.
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.
In two exterior shots of the house, one where Paul is writing and the other when he is sleeping, it shows Paul typing wearing a blue shirt (through the window ) even though he is wearing a red shirt in that scene. In the second exterior shot of the house, later on in the film, it shows that the light is on and Paul can be seen typing even though the light should be off and him being asleep. This reveals that instead of doing two different sequences of rain scenes, they just used the same one instead of both of them. Thus, it does not look like James Caan at all from the distance shown.
Sheriff McCain speaks of a "dead branch" as a possible cause of the tree's being broken, but the entire tree is clearly snapped off halfway up the trunk; there is not merely a broken branch.
When Paul types the line of profanity before starting work, and then looks at it, the last letter he typed is about ten characters to the right of the place on the typewriter where the keys hit the paper. Paul didn't touch the carriage return.
When Annie goes to the general store after yelling at the other driver, there's a USA Today vending machine to the right of the door. It's gone when the Sheriff goes to the store a short time later.
Annie's crucifix is missing when she swings the sledgehammer for the second time.
When Paul gets his pills on a tray, the napkin where they rest changes position on the tray between shots.
At the beginning of the movie when Paul finishes his book, a bottle of Moet et Chandon is shown chilling. At the end of the movie when he finishes and tells Annie he will need three things, she says the cigarette, matches, and Dom Perignon, which she pronounces incorrectly, but he concurs.
Paul's thumbs and thumbnails look completely different when he is first examining the two "Novril" pills handed by Annie, and later in the film when he is crushing them to get to the powder inside.
When Annie shows the sheriff the guest room in which she pretends to write a novel, there should be a chair for her to sit on. But there's no chair to be seen anywhere near the table.
The soup changes from red to orange when Annie spills it on Paul.
When Paul types the word "smudge", he types seven letters.