Patzer

In a previous episode, Jadzia Dax admits that all Trills have spots that start at the forehead and go "all the way" down to the toes. Referencing a subsequent episode in which Jadzia Dax is in bed with her right leg and foot showing skin and spots, in this episode Ezri Dax is seen in a short skirt wearing transparent nylons, and there are no spots on her legs.

In Vic's suite, the crew is discussing who to bring in as the "high roller" that Vic promised Frankie. They suggest, and dismiss, bringing in Worf or Quark. There is a knock at the door and they hide the chalkboard with their plans on it. Ezri then states that there's a problem with the plan, that they're still one man short: the person who will portray the "high roller." That's what they were already discussing.

Julian feels Vic's side and informs him he has three bruised ribs. Bruised ribs cannot be detected by touch in that way. Bruised ribs can be diagnosed visually (the skin over them will be discolored) but generally they are diagnosed by receiving feedback from the patient (complaints of shortness of breath, increased pain when laughing, sneezing, breathing, or coughing, or general pain when moving or at rest).

When Odo is disguised as a tray, Ezri is able to carry him with no problems. Changelings cannot shed or gain mass while changing forms. The tray should weigh just as much as Odo does. This is a recurring error throughout the series.

While preparing for the heist, all the characters are practicing their roles, including Captain Sisko, who is practicing rolling dice for craps. During one practice roll, he give a celebratory "Haha!", but the number he rolls is a 7, which is the least desirable number to roll in most circumstances in the game of craps. However, Sisko is only playacting and most likely imagining/practicing his laugh and reaction if he were to win big in the actual holosuite.

At around the 36 minute mark, a character is standing in front of two pay phones and is talking to someone on the right phone. A few seconds later he says goodbye and hangs up using the phone on the left.

There are three phones on the wall, not two (visible after Bashir sends the countman outside). The countman was on the middle phone, so he's using the right phone of the two phones visible in some shots, and the left in others.

In "It's Only a Paper Moon" Nog (Aron Eisenberg) works with Vic Fontaine (James Darren) to design a new casino for the hotel. This implies that it's Vic that owns the hotel. If Vic owns it he couldn't have been surprised by Frankie Eyes (Robert Miano) buying it. Incorrectly regarded as goof. Vic was not surprised at the hotel purchase, he was surprised at his childhood friend Frankie showing up and the turn of events in the holosuite program, since Vic is aware that he himself is a character in a holosuite, and was unaware of this new twist in the program.

Around the time Zeemo enters the casino, Sisko suddenly has a stack of bills in his hand. He'd previously converted all his cash to chips. There would be no reason for him to handle any money until he cashed out, which he has not yet done.

Sisko turned $10,000 into chips, not "all of his money", and a stack of cash was in front of him on the rail of the table every shot after that.

Vic is aware of his own status as a hologram, yet relates stories of his youth as though they were his own personal experiences.

Vic may be aware that he's a hologram, but that wouldn't stop any childhood memories that he is programmed with (or that the computer program generates for him) from being his personal experiences, at least from his perspective.

The exit sign in Vic's place circa 1962 is green. Exit signs in the USA at that time were red.

Bashir and O'Brien offer to transfer Vic's holographic matrix to another program so he can participate in the battle of the Alamo with them. They do not think to do this after his hotel is taken over by Frankie Eyes. As he is the only self-aware element of the lounge program, the rest could be sacrificed and he could be loaded into a new scenario program.

According to Felix, whatever actions the crew takes within the holosuite program must be "period specific," yet multiple non-human character participate with no problems. Bajorans, Ferengi, Trills, and changelings are not authentic to 1960s Las Vegas.

During the final heist sequence, Frankie Eyes says Kira hasn't touched her drink. He'd just refilled it a few moments earlier. He wouldn't have refilled it if she hadn't consumed its initial contents. She had definitely touched her drink.

Worf is dismissive of his fellow officers' loyalty to Vic, as Vic is a hologram and therefore artificial and not "real." Worf spent nearly 8 years serving with Command Data, another artificial life form. Similar arguments were made about Data's personhood, yet Worf showed loyalty to him as an officer and considered him a close personal friend.