Continuity mistake: Geri (with glasses) knocks off the box of chess pieces after faking a heart attack, but when the camera pulls back at the end of the movie, you can see there is no chess box or pieces on the ground.
Continuity mistake: When the Once-ler is drifting down the river in his bed, he puts his foot in the water, which makes the bed turn. When he puts his foot back onto the bed, it is dry and so is the bed sheet.
Continuity mistake: In the carnivorous plant scene, Manny grabs the fruit (the bait), which is sitting in the middle of the plant. In the next few shots, the bait disappears and then is replaced with a bulb that housed the red and blue "wires".
Revealing mistake: After Chuck steps on the toy duck, he looks up to see the alien family and their house behind them. However, there is no reflection of this on his visor, just an empty field and the trees beyond.
Other mistake: Duke is running through the city while dragging Max by his leash. A close-up shows Max being pulled between the bars of a metal fence, but the gap is much too small for Duke to have passed through.
Factual error: In the sequence where the animals get on the first subway, it says they are on the 59th St subway. But, there is no 59th St subway in NY. The only subway station close to 59 is the 57th St subway.
Suggested correction: While the other correction lists a 59th street, that's in Brooklyn. There is one in Manhattan though, 59th - Columbus Circle, which is also the south-west corner of Central Park.
Suggested correction: There is definitely a 59th street subway station: https://en.wikipedia.org/wiki/59th_Street_ (BMT_Fourth_Avenue_Line).
Factual error: When Brendan Fraser comes out of the Louvre, the Eiffel Tower is right in front of it. The Louvre and the Eiffel Tower are miles away from each other.
Factual error: In the scene where the fireflies light the fireworks there is one problem: The chemical that creates light wouldn't ignite the wick on a firework.
Deliberate mistake: Manny refers to the pirate rabbit as the Easter Bunny, even though Easter never existed in prehistoric times. (00:33:55)
Suggested correction: And mammoths didn't hang out with sloths and smilodons either. It's creative license.
Factual error: During the plague when the fire and rocks are falling from the sky, they fall behind a statue of Rameses and are seen through its hollow eye holes. It makes for a great image, but that would mean that the statue's eyes were punched out like a mask, even though before they were just carved into the stone.
Continuity mistake: Look carefully at the brochure Frank has about the Buffalo Chicken Wing festival, the building pictured is the same building as his daughter's school (seen earlier in the movie).
Suggested correction: While the buildings might look similar, they are different buildings. The school has 3 levels with rectangular windows with a pyramid top while the building in the brochure only has 2 levels of non-rectangular windows and more of a dome shape on top.
Continuity mistake: Lady is put in her bed and the master leaves the kitchen but he goes back in and puts a newspaper on the floor and leaves again but Lady gets out of her bed so the master comes back once more and puts her back in her bed but the newspaper on the floor has vanished.
Continuity mistake: When Dr. Doppler and Jim first observe their ship, Dr. Doppler is right next to Jim when he points it out. When the shot changes to a long shot, they're much farther apart. (00:16:55)
Continuity mistake: Belle and the Beast are ice skating, but when Belle falls onto the snow, her ice skates have turned to brown boots. (00:08:50)
Revealing mistake: In the scene where Rocky and Bullwinkle are walking through the university with Kenan and Kel (right before they come across the anti-moose protest), Kel's right arm passes through Rocky's left several times.
Continuity mistake: When Tiger and Fievel are doing their musical piece, Tiger wipes off the mirror and they appear the same size. When he lays out in front of the mirror, singing the line "We'll be there to pick each other off the floor", he places his head next to the cage bottom, still laying on the floor between them. In the mirror, however, that cage bottom is not reflected at all. (00:57:30)
Continuity mistake: When Rango was at the mayor's office, the mayor grabs out a jug of water, and he opens the lid. But in the next shot, the lid is sealed again.
Continuity mistake: When Wilbur is meeting Charlotte's three daughters in the barn entrance, the medal that the farmer hung there keeps appearing and disappearing between shots, though the duration of the scene.
Continuity mistake: When the Were-Rabbit jumps through the stained glass, the right ear is pointing to both dragon wings. But when the Reverend is telling his tale, the glass break is is pushed way over and the hand print is now where the ear print should be. (00:24:55 - 00:28:15)
Factual error: During the song where Mowgli and Balo are dancing together with other animals, there are several hippopotamus also dancing. This is impossible, as hippopotamus are native to Africa, and the movie is set in India.