When they place Danny in the private room with Bruiser, they are chit-chatting at a normal volume, which leads us to believe that it is a soundproof room. However, later on when Bruiser is faking beating Danny up, they show the two guards on the outside hearing Bruiser hit his fist and make moaning sounds. If they could hear that, they would have been able to hear the whole earlier conversation.
In the scene where Danny meets Linus in Chicago, Danny refers to Las Vegas as "America's Playground." In fact, that designation belongs to Atlantic City, which was known by this nickname for many years before Las Vegas became a gambling center. Las Vegas has never marketed itself as "America's Playground."
Danny claims that casinos are "required by law" to keep enough cash on hand to redeem every chip in play. Not true. there is in fact a set of "formulas" or "guidelines" for cash to be kept by casinos. It generally involves a certain amount for each type of table game open, plus a certain amount for each slot machine of a certain denomination, etc.
Chain attached to briefcase is longer when in the vault then when it is transferred to Saul. When Yen opens money cart in vault and briefcase slides off, the chain is longer and the briefcase goes a lot further over the side of the cart.
The casino manager is seen in two places at the same time. First, he is with Saul when the briefcase is being taken to the vault, while at the same time he is meeting Benedict and Linus as they are escorting Frank out of the casino.
After the "pinch" goes off, and all power comes back on, the cell phone in Tess's pocket rings. She pulls out the cell phone, and pulls the antenna up, but in the flashback when Danny puts the phone in her pocket, the antenna is already pulled out.
At the beginning of the transportation scene the car salesman has two pens in his jacket pocket, then he only has one in the next scene. He then shakes Frank Catton's hand and they again show him having two pens. After he makes a deal for $16,000 they show him with only one pen. (not visible in widescreen version)
In the scene where Livingston tells Danny that guards will be watching him like hawks with video cameras, you can see Reuben removing the cigar and blowing smoke out of his mouth. But in the next above-shot, you can see the cigar magically appear in his mouth again and he removes it and blows out smoke again.
In the scene where Rusty is convincing Saul to become a member of the team at the dog races, an African-American couple can be seen in the background walking across the scene in the same direction twice in two consecutive shots.
When Terry Benedict asks his employee if there is anything for him (in the high rollers room), he responds that Mr. Zerga in the third position (of the baccarat game) wants to talk to him. Mr. Zerga is actually sitting in the first position originally when speaking to the other player at the table. However, when the camera pans back to look at the table, it appears that Mr. Zerga is in the center of the table facing the dealer, and the other player would be in the 5th position now (he was originally sitting in the 3rd position when talking to Mr. Zerga).
When Livingston Dell is getting the signals of the security system in the casino, he exits the area with his shirt all stained with sweat. He forgets the gadget he uses to do his job and the security guy goes after him to give it back, and reaches him when he's about to exit. At that point, Livingston's shirt is not stained anymore
When the van stops on the tarmac the security guard shoots the tires the van drops cleanly onto its rims. When the guard approaches the van, the hubcaps on the left side are intact, but in the wide shot the left rear hubcap is missing. When the van jumps forward and he spins around the hubcap is back.
When the Malloy's are arguing during the balloon distraction the camera pans up from the brothers showing the balloon ribbons are at least 4 feet above Virgil's head, but a minute later he just puts up his hand and grabs them.
When Linus opens the top of the elevator to discover Danny looking down at him, he jumps in surprise. A shot from Danny's view shows him jumping into a corner, meaning the elevator is only as wide as the hole Danny is looking through. But when Danny pulls Linus up through the hole, a shot from inside the elevator shows that it is actually wider.
When Linus gets out of the white van to go join the rest of the crew stealing the Pinch, the camera takes a shot including Linus walking towards the door and the rear right side of the van. In the reflection off the side of the van, 4 crew members are visible sitting down.
During the scene in which Danny explains the security of the Bellagio vault a map is displayed on the screen which shows a portion of the Las Vegas strip. It is incorrect in that it places the MGM Grand casino in the place where the Aladdin (now Planet Hollywood) casino should be. If the MGM Grand were placed in its correct position, it would be partially off the screen.
The goof items below may give away important plot points.
Danny supposed to get a really bad beating. But when Benedict goes to see him after he's been robbed, Danny is hardly out of breath, there's not a mark on him and only his shirt is no longer tucked in, yet Benedict and the two guards don't find this at all suspicious.