Continuity mistake: Unable to make his shadow stick Peter is upset and when Wendy surprises him he zooms up to the ceiling and bangs his head. In this shot the light fixture hangs flush with the ceiling under a decorative medallion around the base. Later, when Peter floats to the ceiling after John says, "You offend reason sir" the fixture now hangs way down on a very long chain.
Continuity mistake: When John says, "You offend reason sir," Peter floats up. The large light fixture is hanging from the ceiling. However, in the next shot facing Peter when he says, "Just think happy thoughts," where is the light fixture? It's gone so Peter can fly around the ceiling, but it's back again in later shots.
Revealing mistake: Aboard the Jolly Roger, in the very next shot after Smee jumps overboard, Peter twirls his sword in mid-air and catches the hilt. This is not the same sword he uses in the previous or following shots. This sword doesn't have the gold hand guard, so as to be able to catch it easily. The hilt on Peter's sword is in the shape of a leaf and the hand guard is the leaf stem.
Trivia: The same actor did the voices for Captain Hook and Mr. Darling in the original Disney movie. This was also the same in plays, as Mr. Darling and Hook were always played by the same actor. This movie follows along with that because Jason Isaacs played both Mr. Darling and Captain Hook.
[Wendy arrives at the house.]
Peter: Welcome, mother! Discipline, that's what fathers believe in. We must spank the children immediately before they try to kill you again. In fact we should kill them.
[Yells and runs after the Lost Boys who scream and hide. Wendy stands between Peter and the Lost Boys.]
Wendy: Father! I agree that they are perfectly horrid but kill them and they'll think themselves important.
Lost Boys: So important!
Curly: And unique!
Wendy: I suggest something far more dreadful. Medicine! It's the most beastly, disgusting stuff, the sticky, sweet kind.
Lost Boys: Kill us! Please Peter!