Continuity mistake: When Mr Fredrickson opens the door there are 4 locks on the front door looking from the outside in. Next scene and consequent scenes there are only 3. (00:12:35)
Continuity mistake: When Plusle goes over to the Minun that is stuck, the bottle on the ground goes from having its text white with its wrapper blue to having its colours reversed. Also, the brickwork on the ground changes between shots. (00:28:31)
Continuity mistake: There's a hole in Conductor Pete's right shoe sole which repeatedly disappears and reappears.
Continuity mistake: When Norm, Olympia and Vera are at Olympia and Vera's apartment, Vera is carrying two grocery bags to put onto the counter whilst Olympia is talking about human activity potentially destroying the Arctic. When Vera puts the grocery bags on the counter, there is nothing shown on the chopping board, but a few shots later, a tomato and an onion have suddenly appeared on the chopping board. (01:03:55)
Continuity mistake: When Mugsy takes Bugs into the other room, you can see the door has no handle, but when Rocky draws a gun and goes to see Bugs, a handle appears from nowhere.
Revealing mistake: Near the end, right when "little wonders" starts, Lewis takes a moment to look at his future family, Lucille, Frannie, etc. When there's a closeup on Lewis, his memory scanner reveals a reflection of no one in the gym, except for Lewis, even though people are supposed to be standing in front of him.
Continuity mistake: When the Wolf runs to the cabin, the front door is initially made of wood. But when the Wolf opens all the doors and finds McPoodle waiting for him, the front door now has molding on it.
Continuity mistake: When Mr. Leonard is closing up Marketropolis, there is nothing behind his car, but when he begins to back out of the parking lot seconds later, a shopping cart has suddenly appeared behind his car. (00:00:20 - 00:01:05)
Continuity mistake: Towards the end, before his arrest, Mr. Crystal's fur is messy; it goes back to being clean less than 2 minutes later when he steps on stage.
Continuity mistake: After Thomas biffs the trucks, the position of the way they are derailed changes between shots.
Other mistake: When 1 strikes off 2 (I think) from the calendar we can see that 1 is Wednesday, 2 is Thursday, 3 is Friday and that 4 is Saturday but 5 is Monday; meaning that Sunday has no date.
Continuity mistake: Rafe has just met the bumbling fool that is his principal: as Leo sneaks out of the building to meet them, behind Rafe a girl wearing white and pink is walking past them and getting into school. Several seconds later as the principal has already begun lecturing Rafe, the camera is back on him and the same girl is again walking behind him and getting to school. (00:07:30)
Continuity mistake: When Merryweather makes the dress blue a second time, it starts off on a ribbon that wraps itself around the dress waistline. The ribbon doesn't make it onto the completed dress.
Suggested correction: Hardly a mistake, since they're using magic and the dress changes multiple times.
Continuity mistake: After the old lady thanks Dash for saving her from getting crushed by the flung blue vehicle, that vehicle suddenly has been moved slightly to the left from its original landing spot. Also, another wrecked light blue vehicle was visible as the aforementioned blue vehicle hit the ground, after the old lady thanks Dash, it has suddenly been replaced by a white wrecked vehicle instead. (00:05:45)
Revealing mistake: When the Level 3 Sentry is firing up into the air for no apparent reason, it fires some rockets with a clear defined smoke trail behind them and disappear off screen. Then the shot jump cuts to further away and suddenly the smoke appears again, but the end of the smoke trails are solid and crisp indicating the animators used the smoke animation as if the rockets had just been fired from that spot... in the middle of the sky. (00:01:10)
Continuity mistake: When Rango is stranded in the middle of the road, he is clutching a drinking glass in his left hand. For the rest of the scene (starting from when he molts), the glass switches to his right hand.
Continuity mistake: At the flight station, when the captain addresses his men and says, "That's 28 men and 28 tries," the captain's ribbons, medals, and cap change colors. (00:03:15)
Other mistake: When the characters go to the Himalayas, the whole time, like for 20 mins, including the confrontation scene, they are all wearing casual, short-sleeved shirts. You can see Mr. Burnish's henchmen wearing winter clothing, while the main characters don't freeze to death. They only start getting cold after a long time.
Deliberate mistake: In the Spanish release, the name of the family store is written in Spanish, but inside the place it's in English everywhere. This is a very common mistake in foreign kids' films released in Spain.
Other mistake: When Sylvester is looking in the mirror whilst trying on hats, one of the hats has a price tag on it which reads $105.95. However, you can see the price numbering is the right way round - it should be back to front.