The movie is about corruption and criminal underworld influences in children's television programming. Stewart plays a network executive, Robin Williams plays a psychotic children's show host and Edward Norton stars as Smoochy the Rhino, the show host with a heart of gold.
Stewart is always deriding either the movie or his performance in it, so I wasn't expecting much, but I was pleasantly surprised. The movie is quite funny and has some good performances. Stewart isn't great but he's not so bad either, and he has a minor role in any case. I thought Edward Norton did a fine job although I would have liked to see the submerged anger of his character fleshed out better. Robin Williams was in over-the-top full psycho mode, which I personally always find fun to watch. The main problem with the movie was it was probably a bit too long.