Continuity mistake: The author in the beginning is supposed to be Gordy grown up, but the grown up Gordy has blue eyes and light hair color and Gordy as a kid had brown hair and brown eyes.
Continuity mistake: At the story told by Gordie about the kid eating pies, at the last pie his face cleans up a little bit between shots.
Continuity mistake: When the boys are continue their journey the second day they are by each other eating blueberries but when it cuts Gordy and Chris are in front of Teddy and Vern while the others are both holding a string.
Revealing mistake: When Ace runs the truck driver off the road, it's obvious that Ace Billy and Charlie are stunt doubles, because of the hair and age.
Continuity mistake: In the beginning scene, the newspaper clipping under the headline shows the first sentence to be about Chris' death from a stabbing, but the next line starts mid sentence about a completely different subject and the second column under the headline talks about taxes, mentioning nothing about the death.
Continuity mistake: All throughout the movie, the angle of the sun and shadows change within scenes. Especially in the scene when the boys are near the train bridge talking. As the camera shots switch, the shadows change angles.
Continuity mistake: When the boys are in the treehouse at the beginning, the coca cola bottle on the treehouse shelf constantly moves places between shots. The two sides of the bottle saying "coke" and "coca-cola" keep switching positions between shots also. (00:02:55 - 00:04:55)
Revealing mistake: During the Barf-O-Rama scene, look and you can see that everyone is puking the same thing. No one in the crowd was in the contest.
Suggested correction: This scene is part of a fictional story being told by one of the characters; since everything depicted is taking place within the characters' imaginations, this is not a mistake.
Factual error: There's a scene with a house in the background that has the electric wires from the power pole going to a connection above the roof. In 1959, the connection would have been made under the eaves or on the outer wall.
Continuity mistake: After Teddy tries to dodge the train, the boys head back in the opposite direction they were walking. Not a question of camera angles. They're walking towards the oncoming train. After the train passes, they resume walking in the same direction it passed.