After reviewing Mother Paula's commercial, at the corporate headquarters, the man who enters the room to inform Muckle of a waiting phone call is Carl Hiaasen himself: the author of the book.
Towards the end of the film, Mullet Fingers is making a last ditch attempt to get the construction to stop. At one point, Mullet Fingers' mouth says, "Damn" and the audio says, "Dang".
In the scene where Officer Delinko comes to tell Roy's parents that Roy has been bitten by a dog and taken to the hospital, the officer has a toothpick in his mouth. During the course of the conversation after that, when he has his back to the camera, you do see the toothpick; in all of the front shots of him, the toothpick is missing.