Other mistake: When Tinker Bell constructs a boat with the playing cards paddle wheel, she uses a clip and a rope to make sure the paddle wheel doesn't start turning. However the rope would only work at stopping the rotation if the wheel turned backwards. Since it turns forward, the rope shouldn't be able to stop the rotation.
Tinker Bell and the Lost Treasure (2009)
1 other mistake
Directed by: Klay Hall
Starring: Lucy Liu, Mae Whitman, Jesse McCartney, Jane Horrocks
Continuity mistake: Near the end of the movie, there is a large procession of fairies accompanying Tinker Bell, who is carrying the Fall Scepter. The wings of the second row of fairies disappear in one scene.
Trivia: A hidden Mickey can be seen when Tinker bell drops her pixie dust on the cotton balls and they float up.