Continuity mistake: After the Grinch unscrews the light bulb in the town Christmas tree, all the lights in the town go dark and the Grinch starts to take off in his sled-thing. When they show a close up of him, the lights are on. Then a few seconds later, the lights are off again.
Other mistake: When Hallee Hirsh 's name appears in the credits, a kid on a scooter moves across the screen, and he looks into the camera. (00:00:35)