Revealing mistake: When Willy enters the apartment and heads for the stairs, Sam dives at him in anger and flies through him. In this shot you can see how poorly Willy was added into the scene. The coloration isn't even close and Willy looks 2-dimensional. (00:32:30)
Continuity mistake: When Oda Mae is pretending to contact Mrs Santiago's dead husband she first pretends it's too difficult and one of her sisters moves to hand her back her money. When the bill is extended to Mrs Santiago, it's folded the long way and held by the sister at the very end. When Oda Mae pretends to feel something and the shot changes, the bill appears to be folded the other way and the sister is holding it in the middle. (00:40:25)
Revealing mistake: When Sam is going back to Oda Mae's, when he's walking toward the door his reflection is visible walking the same way, though he's not in front of the window at an angle this would be possible for a few seconds. I don't know exactly what could cause on the filming side of the mistake, just that there's no way the reflection would look like that. (01:18:05)
Revealing mistake: When Carl is accessing the recently closed account, he moves to a second computer to attempt it. Look at the screen before he gets there. It already has the "account closed" and account information blinking on the screen. It's highly unlikely that he tried the account on that computer before, because when he first leaves his chair he looks around the room for an open computer. (01:31:30)
Visible crew/equipment: When moving into their apartment Patrick Swazye kicks the statue to make it swing so they can get it inside. As they are looking at the statue, two moving men cross in back of them carring a mirror and as they pass you can see the director and camera crew in the reflection.
Continuity mistake: After they take $4 million from bank they walk outside where a young woman with long black hair, blue blouse, gray dress, black purse and white shoes walks by Oda Mae. Sam and Oda Mae argue for a few minutes, over what to do with the check. When they walk over to the nuns, the same woman walks by Oda Mae again.
Continuity mistake: When Carl is sitting alone at his computer in his office, having found his fake bank account emptied, a glass of water can clearly be seen next to Carl's computer. However, after he sees the empty chair (that Sam is sitting in) roll past him, the next shot of Carl's computer shows the glass of water now gone.
Continuity mistake: When Oda Mae and Sam first go to Molly's apartment, Oda Mae is seen walking across the street wearing black shoes. They appear to be flats or sandals or something like that. After Oda Mae rings the bell and speaks to Molly unsuccessfully, she turns and walks down the building steps to leave and she is now wearing white sneakers.Tina Gilliam
Other mistake: When Carl has received the Nassau bank account number from the drug dealer on the phone, afterward you see him typing in "Rita Miller" on the computer. If you watch closely, his left hand pinky never touches the "A" key on the keyboard, yet the "A" in Rita comes up just fine and out of sync with the clicking sounds of the keyboard.
Other mistake: When Molly and Sam are "dancing" to the jukebox playing Unchained Melody by the Righteous Brothers, the tone arm is shown dropping onto the record at the start of the music. When the song finishes, the arm is still at the beginning of the record and then lifts off, as if the reject button was pushed before the record played.James Phillips