Continuity mistake: In the scene were Hans tries to hang himself, you can see that the chandelier falls down but in the next scene when O.J the owl flies underneath it, it is still there.
Factual error: There is one scene in the movie where Heath Ledger reads a Latin sentence in a book. As he is translating the sentence, he goes over the words one by one with his finger. This would never be possible in a Latin sentence, because words in Latin are never - I repeat: never - in exactly the same order as in English. Words that actually belong together can be placed on opposite ends of a sentence.
Factual error: Fairfax was not present at the trial of Charles I, although his wife Anne was, (and was forcibly removed after telling the court what she thought of them).
Audio problem: When Galleria is playing the piano by herself at school, it's obvious she really isn't playing. Her hands are moving way too slow for some of the parts and at the end, her hands are playing very low on the bass notes when the notes heard are in middle-low C range.
Visible crew/equipment: When Donna and her boyfriend leave his family's house in the end, in the front window of the house you can see a white van and film crew.
Continuity mistake: Marion isn't wearing any clothes as they enter the convenience store. However, as they are standing in the doorway you can see he is wearing boxers.
Continuity mistake: When Helen puts the trashbag down, with the teddy on top, the teddy's scarf hangs down over its face. But when Gypsy picks it up, the scarf is no longer hanging over its face.
Continuity mistake: When Isabelle arrives in front of Roxy's apartment, you can see the cab driver close the trunk after he removes Isabelle's bags, but when Charles-Henri hands the driver his bags a moment later the trunk is still open.
Revealing mistake: The shots of the aircraft in flight (carrying the liver) at the beginning of the film have been flipped. The "tail number" of the plane is visible and is obviously backwards.
Continuity mistake: Curtis is helping Molly seal the windows by screwing them shut. He hands the drill to Molly and she holds it up by her chest. When Claudia walks into the room Molly lowers the drill down in front of her below her waist. Then there is a quick cut back to Molly and Curtis as he says, " well that should do it", and the drill is back up in front of her chest again as she lowers it down a second time.
Audio problem: When Steve is thanking Melissa for marrying Mark, the bride turns out to be Angela. Angela knocks Steve to the floor and grabs a gun from under her wedding dress. You can hear the sound of a hammer cocking but the gun turns out to be a hammerless automatic.
Audio problem: When Zero and Marcel are fighting over the music near the beginning, the music regularly changes before their fingers reach the buttons.
Revealing mistake: Katie Holmes appears to have a bandage on her finger way before she actually gets hurt. When Bobby hangs the turkey drawing on the door and she kisses him goodbye, the bandage is on her finger, but it's not until she peels the potatoes that her finger is cut. (00:14:25 - 00:24:50)
Continuity mistake: At the very beginning of the movie, Rachel Leigh Cook drops Doleman off at the bank and he says, "I'm going to go in there and blow them away." At the end of the movie, when the scene is replayed from a different camera angle, he says, "I'm going to go and try and blow them away."
Continuity mistake: In the beginning when the text of the book is seen the format of the date of the peoples death is MM/DD/YY later in the movie the dates are seen again and the format has changed to DD - MONTH - YYYY.
Continuity mistake: When Pancho and Frank are bathing in the lake, you see an Italian Horn on Frank's necklace. The camera angle changes and it is now a medallion.
Factual error: In the scene where Tom and O'Malley are talking in O'Malley's flat, the chessboard in between them is set up the wrong way round.
Audio problem: Just after Molly gets fired and she sees Neal while crossing the street, he says something like, "...been able to write a decent song since I last saw you..." His lips don't match what he's saying.
Revealing mistake: In the scene where Phil Kaufman is in the hospital searching for Gram Parsons' body, he pulls back the sheet covering the body and the actor playing the corpse moves his eye - the right one to be precise.
Factual error: When Griet is introduced to the camera obscura, far too much light is projected onto Vermeer's and Griet's faces. Camera obscuras don't make their own light; rather the image produced on the viewing screen is always dull.