In the film, Harry makes a joke that the kind of writing that pays the best is ransom notes. The following year, Rene Russo and Delroy Lindo appeared together in Ransom (1996).
The original scene with Penny Marshall's cameo had her getting into her car and driving off when the shoot was finished; but the actress hadn't driven a car in many years so it was changed that her assistant drives her off.
When Martin meets Chili, Karen and Harry at the restaurant, he orders an omelet. Moments later, he leaves as if he completely forgot what he just ordered.
When Bo is looking at the newspaper article about Zimm and Ray ("Horror Film Producer Questioned in Shooting"), the first and third columns of text visible above the article are identical.
Bo Catlett: You see how he just went over the rail like that? Maybe I could get Chili Palmer up here, and you could fix my balcony to give way like they do in the movies. I invite him to take a look at my view, he leans over the rail, pitches off the balcony into the sweet by-and-by...
Martin: [to Harry]
I'm really glad you rejected me ten years ago when I auditioned for the part of Eddie Solomon, the pedophile clown in "Birthday Boy". If I'd have gotten that part, I might have been typecast.