Before Nicholas enters Merlin's shop, the knight standing by the door wears a metal helmet in some shots, but not in others.
When Nicholas first sees the knight outside the shop, it is standing to the left of the door. In the following shot, the knight is on the right of the door.
The oil lamp changes hands after Grampa lights it.
Just before Grampa tells the story, his arm is stretched across the top of the sofa. In the next shot, his arm is by his side.
When Susan and Madeline talk outside Merlin's shop, a van on the road behind them disappears between shots, a car parked by the sidewalk vanishes, and some vehicles roll by twice.
When Michael's father hoists himself out of the crevasse, the mud shifts in a large block, revealing itself as a piece of foam or plaster.
During Merlin's final scene, as his head goes back, one of the rocks folds back.
When the power goes out, the grandson says "Now I'm gonna miss the movie." Seconds later, a young boy in dark clothes walks by in the background, on the right side.
In some high-angled shots inside Merlin's shop, after Susan and Nicholas leave and Mr. Cooper is talking, a crew member in a black top and jeans is visible at the bottom of the screen, on the right side, sitting down and watching the actors.
In some high-angled shots inside Merlin's shop, a crew member is visible on the left, reading the script.
Outside Merlin's shop, above Susan when she says to Nicholas, "Did you see where Mommy put her keys?"