Continuity mistake: When Robert finds Celine after she has been kidnapped by O'Reilly and Jackson we see several times that O'Reilly has bled from her left nostril and the blood has run down onto her bottom lip. After she gets shot, the blood stops at her top lip. (01:22:30 - 01:23:50)
Continuity mistake: When Ernie picks up the cereal pack and walks to the table, the mouse has chewed a hole in the pack, and cereals drops on the floor (the whole pack of cereals). And later in a shot from a different angle, the cereal is gone.
Continuity mistake: When Ed is skating through the park and the baby gets mixed up with the players, they throw the baby through the hoop. If you watch, the man who threw the baby through the hoop doesn't have sleeves, but when it shows the baby being caught, the catcher has sleeves. Then it goes back to the person who supposedly caught him, but he has no sleeves again.
Continuity mistake: In the scene where Wayne makes his speech at Szalynski Labs, he pretends to stand in a strange shape. When he does so, his speech cards are facing down. In the very next shot, the cards are facing up.
Continuity mistake: In the last scene where Brad and Caroline are apologising to Sam, when he says, "You think we didn't know?" and Caroline says, "Yeah", her head is straight, but the next shot her head is on a right tilt. (01:44:20)
Continuity mistake: In the scene where Vincent is meeting the thug in the pool hall to trade money in exchange for Emily, the thug makes a move for the money bag, and Vincent grabs his arm. At first, he grabs his right arm, then it cuts to another angle and he actually has his left arm.
Continuity mistake: When Courteney Cox and Aiden Quinn start kissing, her head is tilted to the right. The camera changes angles and her head's to the left.
Continuity mistake: When the man at the wedding (in the gazebo) is shown wearing a money jacket, he removes the outer jacket he is wearing twice.
Continuity mistake: At the end of the dress rehearsal, when the policeman looks around the corner, someone's shirt appears on the armrest of Nathe's chair. (01:01:40)
Continuity mistake: When Joe goes to quit, it is late afternoon (it is getting dusky). But when he shows up at Ben's house afterwards to tell him that he just quit, it is lighter, like it's the middle of the day.
Continuity mistake: When Rollo is standing next to the lemur cage and waves at the approaching Willa he raises his right arm, but when the camera angle changes we see him lowering his left arm. (00:47:55)
Continuity mistake: When Joy is packing up to leave for eastern Europe, she's talking to her mom and she has two trolls in her hand, and you can see that the troll with the blue hair is still on the stand. In the next shot, she has the troll with the blue hair in her hand.
Continuity mistake: In the middle of the hotel fight when Toby and Deliverance go through the door in their hotel room you see the door open and a number of shots impact it. The characters then go through the second of the double doors. This is commented on in the DVD commentary. Not only do the bullets not go through the second door, they don't go through the first. On top of that, you see a shot with the two doors opened, but when the bad guys enter the room the double doors miraculously turn into just one! This layout is then used for the rest of the scene.
Continuity mistake: When Joe and Gus enter the diner towards the start of the film we see the waitress come over to see if they are ready to order. The camera switches from looking at Gus and then to Joe. When the camera is on Joe, we see the guy sitting with his back to Joe turns his head round to the left to look at Joe and Gus. Then when the camera changes angle to look at Gus and Joe from in front of this guy, his head is twisting back round from the other direction (right to left).
Continuity mistake: In the final scene, when Parker Posey shoots her brother, just before they act out their JFK shooting re-enactment her shirt is unbuttoned and she begins to button it. A couple of minutes later, when she's holding the gun, her shirt is unbuttoned again.
Continuity mistake: In the last scene, Max's bathing suit changes color, from dark blue to light tan, back to dark blue.
Continuity mistake: Robert Downey Jr.'s two girl friends sit down at the kitchen counter of one's loft to share a bottle of tequila and their sorrows. The camera shifts back and forth between the two as they dialogue and the cap to the tequila bottle sitting on the counter disappears and reappears between shots.
Continuity mistake: In the bathroom scene, the toilet seat position differs between shots.
Continuity mistake: When the earthquake happens, the phone falls off the hook so the lady can't get through to the house, and the phone is making that really annoying sound when it's off the hook. The phone is a portable so it shouldn't matter that it is off the hook, and when her daughter comes home it stops making that annoying sound when a phone is off the hook.
Continuity mistake: When Jeffrey is on the phone, he is holding the phone by his ear in the front view, while in the shot of his back there is no phone by his ear.