During the scene where they are in the bar (after meeting the Muse, Selma Hayak). They are sitting at a table and there is a drink in front of Selma Hayak. She is talking, and you can see that the drink is about half full, or more, and then the camera cuts to a different angle, but you can still hear Selma talking (ie. she couldn't have had anything to drink). Now, when the camera cuts back to her, the drink is suddenly nearly gone.

Not a *huge* mistake, but I thought it was kind of cool.