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)
Continuity mistake: At the end, when Dianne's "taxi" shows up, Scott and Dianne go for a drive in Scott's car. The rearview mirror is gone in their close-ups, but it's back in its proper place mounted between the windshields in wide shots. (01:35:35)
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.