Continuity mistake: In the scene where Percy is talking to Stephen, Thomas reverses down the track he has arrived on and stops. But when Percy leaves, Thomas has mysteriously disappeared. Also, the track Thomas was on ends at some buffers behind him and leads to the turntable in front of him, but that was set to Percy's line.
Continuity mistake: Julia Louis-Dreyfus is getting her toe nails painted by her daughter's friend. The first shot is of her feet right next to each other. The very next shot, her legs are crossed.
Continuity mistake: Young Dan and Jo are fighting over their meal. The position of the tray on the table changes several times, most noticeably when Dan leaps off the table. Moreover, when he returns to it after he jumped off the bed, the tray is empty minus a little red berry, but it still had rice and other food on it earlier. (00:18:30)
Character mistake: At the party, Fred is supposed to make a bbq, feeding about 50 people. But once he's got the fire going, he puts two lonely pieces of hamburger meat on top, to cook - only two.
Visible crew/equipment: At the start of the '500 Miles' sequence where Davy catches up with Yvonne, you can see a crew member indicating to some joggers to run into the scene on cue.
Audio problem: When Tony is telling Pepper about what happened to Rhodey, there is one shot of the side of Tony, slightly to a back angle where he is talking. His jaw does not move at all while speaking during that shot. (00:27:10)
Factual error: When Oscar's mother visits him in prison on New Year's in 2007, a mention is made of him having taken his daughter to see "WALL-E", which wasn't released until the summer of 2008.
Continuity mistake: Before Iggy gets his horns, he got a shot of whisky in the bar from the blonde girl. The level of whisky changes between shots.
Continuity mistake: Just after Miller, Casey, and Jeff Chang get away from the college's health center and steal the SUV, they plow through a row of street-side parking meters that snap off and hit the windshield, cracking it. Through subsequent shots, the windshield continually goes from being cracked to completely undamaged.
Factual error: They inject the infected Brunel with antibiotics to fight the bacteria, however there is no pulse and that means the antibiotic can never spread through the body, as there is no blood circulation.
Continuity mistake: As Charlotte and her father are hearing Paganini play the violin in their house, they walk to the stairs. As they reach it, her father's head suddenly is turned facing up the stairs.
Continuity mistake: When Romeo gives his hand to Juliet on the balcony before descending, he gives his right hand to Juliet. Immediately his left hand is shown in Juliet's, then his right hand is shown in hers again.
Visible crew/equipment: When Ethan Hawke and Julie Delpy are in the hotel room arguing, they sit down at a table in the room. In the glass reflection of the framed picture on the wall, you can see the cameraman.
Visible crew/equipment: In the opening close up shot of the eye, you can see a reflector screen reflected in it. (00:04:10)
Continuity mistake: When Alan drops his driving gloves on the way out of the board meeting, the way they're arranged on the floor changes between shots.
Continuity mistake: At the beginning, as Raimund is crossing the bridge in the rain, his umbrella turns inside out, but as it flies away to the river, it is not turned.
Continuity mistake: In the gym before the lady says "why do we have to turn around" Roxanne is facing the front and then turns and then when the man says "if we please" Roxanne is turning around again.
Suggested correction: Roxanne was looking back at the janitor guy so therefore she didn't turn around twice.
Continuity mistake: As in most movies I've seen where size is a main factor, the animators did not pay much attention to scale. In the scene where the main character leads the leaf people to her father's house, she is jumping and lands on the thinnest pencils I've ever seen. They have the width of the pencil smaller than her foot. However later on, it is shown that a push pin is almost the size of her body.
Revealing mistake: When Tanya has just died, her face goes still and she stops breathing, but you can still see her pulse beating in her neck.
Continuity mistake: When The Rock is putting early in the movie he is on the phone, when the shot comes back to the room the putting green is missing. (00:01:50)