Revealing mistake: At the beginning of the scene near the end of the movie with Lucius Malfoy fuming at Dumbledore in his office, Malfoy's hair is fanned back behind his shoulders. The lighting in the room illuminates the back of his neck, where you can see his real, short brown hair. (02:22:05)
Revealing mistake: When Scooby, Shaggy, Mary Jane, and Daphne go crashing through the window while running from the two monsters, the falling glass and broken window frame pass right through the CGI Scooby. (00:42:30)
Revealing mistake: In the beginning of the movie when Charlie is in the gym, the last can of spray paint he uses, just before the Principal catches him, appears to spray 'clear'.
Revealing mistake: At the scene where all the spy kids are fighting the waiters, watch Gary as he is fighting. The waiter he is fighting throws him back, but then Gary activates his rockets shoes. Yet to activate those shoes you have to tap them together. The rocket shoes activate a few seconds before Gary tapped his heels together.
Revealing mistake: When Stuart's dad is giving final instructions to Stuart as he's about to lower him down the drain, Stuart (and his bright yellow shirt) aren't reflected in the dad's glasses.
Revealing mistake: When Calvin falls out of the tree, he lands on the ground on his back. This would at least knock the breath out of him, but he is not hurt at all.
Revealing mistake: In the flood scene, you can see six inch boards on all the doorways keeping the water from spilling into adjacent rooms. (00:28:23)
Revealing mistake: When Ted Brookes slides onto the ice pond after falling down the hill, you can see that at first he slides onto an actual ice pond. In the next shot, you can see that the ice has changed and he is now on a fake ice pond when it starts to break.
Revealing mistake: Winnie gets angry at her parents and runs out of the house. As her father stands up and she runs past the camera it wobbles, shaking the screen a bit.
Revealing mistake: After blue-Marty exits the pool he heads upstairs and when Jason and Kaylee spy on him dancing (with Mr. FB) Marty's entire body is dyed blue, but the blue only reaches to just above the bottom of his bare feet.
Revealing mistake: After Spirit gets his second wind when the Colonel is attempting to break him, he breaks the girth/cinch strap by catching it on the fence. At one brief point, the pole of the fence actually appears to pass between Spirit and the girth of the saddle.
Revealing mistake: The Bears' bus is driving by a green highway sign reading something like "Nutville 2". Road signs are normally made of something rigid. But as the bus passes, the sign ripples in the breeze, and you can tell it's just made of fabric or plastic.
Revealing mistake: When Pistachio spits out the cherries at the henchman, in one shot you can clearly see that they are coming in from two angles, and not just from Pistachio. (01:01:55)
Revealing mistake: When the head of security carries Arnold and Gerald into Scheck's office, as the camera zooms in on Scheck, one of his buttons disappears twice in two frames, and his other button completely disappears mid-shot. (00:30:18)