Factual error: When Richard asks Art his opinion of his book, a copy of "Haymarket Scrapbook" is on a shelf. This book was first published in 1986, yet Richard's book will be published in 1981.

Factual error: When Art buys a soda, a close-up reveals the quarter he uses is not a pre-1998 US Quarter (George Washington bust on the front, eagle on the back), nor the 1976 Bicentennial version, but appears to be one of the 50-states series of 1998-2008 quarters, most likely Oregon (which happens to be the state where the filming was done).