Continuity mistake: The tip of Shere Khan's tail is orange, except when Baloo grabs it to stop him from attacking Mowgli and runs around in circles. Then it turns brown.
Revealing mistake: In the scene where King Arthur expounds on the joy of his kingdom, he has a Band-Aid on the back of his neck. (00:21:00)
Revealing mistake: When Jimmy and Millie are sitting on the ledge of the building she works in, Jimmy leans forward, and the top of his head disappears - or actually fades into the background.
Revealing mistake: After Scott and Tom switch places, during the drive down to the hotel, in some close-ups there's black tape covering the motorcycle's chrome trim. (00:06:35 - 00:07:10)