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)
Continuity mistake: When Paul is dining with his agent at the end, after he puts his book down, he picks up a menu. But when the camera angle changes to face him, his hand is empty.
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)
Continuity mistake: When Annie is shaving Paul, she doesn't shave his chin, but, a second later, his chin is shaved.
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.
Continuity mistake: When the sheriff looks at the last newspaper article about Annie, the caption reads "There is a higher justice than that of man..." Then when it zooms in on the caption it is switched to "There is a justice higher than that of man..." (The 2nd one matches the Misery book quote). (01:25:00)
Continuity mistake: When Paul complains that the paper smudges, Paul types seven letters on a piece of paper to prove it. In the next scene, we see the word he typed was "smudge" which only has six letters.
Answer: Stephen King doesn't have a cameo in this movie.
I have been told it's a common misconception that Stephen King regularly does cameos.
lionhead