Executive Meddling: For the better, perhaps. The film's original director, Jan Pinkava, was replaced with Brad Bird after Pinkava was unable to come up with a satisfactory resolution to the story. Bird, who had won an Oscar for his work on The Incredibles a year earlier, was given a tight deadline to rewrite the script using already finished models of the characters in place and make it better! Among the most apparent changes were redesigning the rats to make them less cartoony and killing off Gusteau, only having him appear through Rémy's imagination. He won a second Oscar for this film. Needless to say, he took a brief hiatus from film-making after this.
The Mockbuster: Video Brinquedo attempted to cash in on the success of this film with Ratatoing, a movie with a plot that was completely different (although infinitely more idiotic), but with a setting identical enough to be considered copyright infringement. Except instead of Paris it was, for Creator Provincialism reasons, Rio de Janeiro.
So My Kids Can Watch: Patton Oswalt's stand-up routine is not only quite vulgar, but filled withobscure, nerdy references and not appropriate at all for kids. He has one routine about how, in the press tour for this movie, he had a lot of trouble being positive and friendly in front of his audience. Although the man does do quite a lot of voice-work for many other lower-profile kid-friendly projects, so it was probably more about the required constant promotion of the film. His profane rant on Black Angus is what got him approached for the role; in addition to being really funny, Brad Bird liked the sound of Oswalt describing the food in his routine.