Revealing mistake: The wires holding up Jacob Marley's floating lock box and chains are visible. (00:32:10)
Revealing mistake: In the end, Phillip lands in the chair and he stops bouncing. You think he would still bounce even though the chair was soft.
Revealing mistake: When Ernest's jack flies out from under his truck it breaks the back windshield of the mayor's car. Watch closely and you can see the glass shatter before the jack makes contact with it.
Revealing mistake: At one point when the sheep are in a neat formation, you can see straps holding them still.
Revealing mistake: When the 3 children are waiting for their mother, the rain is pouring down. Yet, when they are gathered around the Russian guy on the floor, their clothes are dry.
Revealing mistake: At Jareth's castle, in the room with the Escher stairs, Sarah sees Toby and she jumps. It's very apparent that it's a stuntwoman jumping from the ledge in the wide shot. (01:30:20)
Revealing mistake: After Jason's fight with Acastus, when Medea is telling Jason of the flower which can heal his wound, if you look past Medea you can see a mountain in the distance. On top of the mountain you can see a lighted building of some sort that appears to be a modern structure. (01:15:05)
Revealing mistake: When Beauty is nursing from his mother, you can see that the foal used was a filly and not a colt when "his" tail swishes from side to side.
Revealing mistake: Wait until the end of the bonus footage of the Spice Girls' live performance of "Mama". At the very end of the song, the music and voices fade out. Sporty appears to throw her body and soul into one of the lyrics, even though the lyric is barely audible because of the fadeout. It actually looks pretty funny.
Revealing mistake: When the kid is playing the Game Gear and says 'I thought I was playing Shinobi. This isn't Shinobi. Where's Shinobi?', there is no game inserted in the Game Gear.
Revealing mistake: When the musicians stop playing and the world leaders start getting up from the table, it goes to a shot spanning the entire table, but also showing the musician's stage. This is where you see the mistake, as you see Berkhamp suddenly at the front of the stage wearing his headband and dancing, when it cuts away from that shot, it shows Berkhamp is still sitting behind his instrument with his headband still off. Then we find that out of place shot was recycled from when Berkhamp actually was onstage and dancing as we see the exact same shot again less than a minute later, this time the shot is where it's supposed to be however this is still a mistake and quite an odd one. (01:26:25)
Revealing mistake: When in Boston, while walking through the park, Susan and her mother are obviously walking on a treadmill because the park background is moving way too fast for their walking speed.
Revealing mistake: When Will flies back in through the window and picks up Royal Pain, you can see that the back of Will's jacket is sticking up, which was where the harness was lifting him up. (01:24:05)
Revealing mistake: In the scene where Mr.Wilson slips on the bath water and falls, after he does the split you can see his right leg is fake.
Revealing mistake: While Nick and his father are driving home with the giant baby behind (an obvious green screen projection), the baby breaks a tube from the car and throws it to the floor. Nick bends down to pick up a prop located offscreen, to add up for realism, but the problem is that he bends down before the baby throws it, so the whole trick is revealed.
Revealing mistake: When the Grinch is cutting Max's antler, the cut lines appear on the prongs before he actually starts to cut.
Revealing mistake: If you watch Herb's wife Patty drink her hot chocolate, it is very easy to see that the cup is empty.
Revealing mistake: During the wedding scene, while the narrator is talking, you can see the string that will pull the left table apart. As said in the commentary, the filmmakers weren't going for the idea of people pulling the tables apart, but rather some other force parting them. (01:27:40)
Revealing mistake: When Kate is telling the kids that their dad is quitting his job, the boy called Mike looks directly at the camera.
Revealing mistake: The ball Lou Gehrig hits that smashes a window doesn't come off his bat. It comes from behind him.