Continuity mistake: The three selects that Dennis shows Dee, the guy with the black tank top and sunglasses is all the way to the left. When the shot switches the guy is all the way on the right - this is the guy Dee says is "One big chin." (00:06:00)
Continuity mistake: When Dee is standing up she is smoking a cigarette with her right hand. When the shot comes back to her as she cuts Charlie's joke off, the cigarette has disappeared and the bottle of whiskey has left the table and is in her right hand. (00:01:15)
Continuity mistake: When Dennis is showing Dee the photos of his male selections, the order of them changes after the camera switches to Dee's face. (00:06:11)
Continuity mistake: The way Dennis holds the 3 pictures of men changes. When he's showing them, he holds them next to his chest with one hand. Then when Dee's talking about them, he's holding them out with both hands.
Continuity mistake: The plane that Dee gets onto has winglets and a dark blue/black stripe around it. When seen flying in the next shot, the plane has no winglets and a red stripe.
Continuity mistake: When the gang barges into Dee's apartment they leave the door wide open. When the shot goes to Charlie and Dennis the door is half-way closed, when the shot goes back out to all 4 of them asking "Which one?" the door is open all the way again. It goes back to the Charlie and Dennis shot with the door halfway closed one more time before the scene closes. (00:02:20 - 00:03:30)
