When Sam Harmon is singing 'Ain't That A Kick In The Head', a trumpet solo is featured most prominently, but the jazz combo on stage has no trumpet player. Instead, there is a saxophonist who mimes his part.
Sam Harmon jokingly says, "Repeal the 14th and the 20th Amendment. Take the vote away from the women and make slaves out of them." He's off by one, on both points: the 13th Amendment abolished slavery, and the 19th gave women the vote.
In the scene where Danny gives his mistress his room key, in the background a so-called professional roulette dealer tries to spin the ball and fails. He snatches the ball out again and fails again. In a third attempt, he somehow makes the ball go around the rim as it should. The actor playing the dealer has obviously never thrown a roulette ball in his life.
When Danny Ocean is showing the other guys the five hotels on the scarf, in the overhead shot he is pointing with his right hand. When it cuts to show him from the front, he is pointing with his left hand.
While ten-pin bowling, Josh lights up and starts smoking. When we move to a close up, the cigarette and smoke have disappeared, and the guy next to him has suddenly moved right next to him. When we shoot back, Josh is smoking again and sitting on his own.
Danny and Tony are casing the Sands and sit down at the lunch counter beside an attractive woman in the white dress and stole. The blue water pitcher on a saucer in front of the woman suddenly turns into a basket of dinner rolls between camera shots.
When Bergdorf is talking to Corneal after seeing the doctor, in the close-up shot of Bergdorf talking through the car window, the car door is locked, but it's unlocked in the wide shot when he opens the door to get in.
When Vince is fighting the club patrons who yelled at his wife, the owner and bartender are leaning sideways at the far end of the bar. But when the film cuts immediately to a two-shot, the owner and bartender are standing up straight, in the middle of the bar.
When Josh (shot at an angle, over Vince's left shoulder) talks about being a one-eyed ballplayer in Mobile, his arms are down at his sides. But when it cuts immediately to a two-shot, he's using both hands to light a cigarette.
The men of Ocean's Eleven are supposed to be war buddies from the 82nd Airborne during WWII. However, during WWII the US Army was segregated by race. Josh Howard talks about his experiences during the war while on patrol; since he's black, he would have been assigned to the 555th Parachute Infantry Regiment, which was never sent overseas but instead became smoke jumpers in the Pacific Northwest. Therefore, Josh Howard should never have met the others, at least, not during the war.
At the garbage truck lot early in the movie, Vince mentions Josh's having been awarded the "DSM" (the Distinguished Service Medal). The DSM is the Army's highest non-heroism award for meritorious service, awarded almost exclusively to high-ranking career officers. Vince would have meant to say the "DSC", or the Distinguished Service Cross, the second highest award for valor in combat, after the Medal of Honor.
At times during Josh's song accompanied by the harmonica-playing garbageman, the harmonica can be heard when he is holding it at least a foot from his mouth. However, in these shots, there is a second harmonica accompanist, partially visible on the far right side of the frame.
Key in the plot is that the stolen money is placed in the coffin along with the body of Bergdorf (Richard Conte) and cremated.
The type coffin his body is in is never placed in a crematorium.
The body would be transferred to a simple wooden container before being placed in the oven, in which case the mortuary workers would have discovered the cash.
While discussing the heist with his gang, Danny states that it takes exactly 1 minute and 38 seconds to sing Auld Lang Syne, and that this is critical to timing the length of the planned electrical blackout during which they will rob the casinos. However, we later see that the song is being played at a different tempo in each casino, which would throw the timing off, making it impossible to coordinate a heist that relies on precision timing.
When Roger goes to Tony Bergdorf's old appliance store, the new owner tells him Tony's in San Quentin. Roger asks to use the owner's phone and immediately calls Acebos to give him the news. But as he's overheard on Acebos's phone, Roger tells him that Tony is in prison doing a sentence of "1 to 5". As the store owner hadn't told him that, and he had had no idea Tony was even in prison, there was no way Roger could have known, or told Acebos, what Bergdorf's sentence was.
After the heist, Josh drives a garbage truck to pick up the stolen money. There are two men riding on the back of the garbage truck. Moments later, we see the garbage truck as it approaches a roadblock but now the two men are missing. The other 10 men of Ocean's Eleven were out heisting the casinos. Who these two extra men are and what happened to them is never explained.
(at around 39 mins) Acebos' houseboy hands him a phone by the pool. Instead of walking off-screen he crouches behind a table, glancing at the camera as though unsure whether or not he's still in the shot.