One thing that the Special Edition did for Star Wars was make clear that it had borrowed the Humphrey Bogart and "Little Pete[r Lorre]-Big Syd[ney Greenstreet]" characters which came from The Maltese Falcon via Casablanca. Sam Spade-Rick Blaine-Han Solo; Casper Gutman-Signor Ferrari-Jabba the Hutt (original version); Joel Cairo-Ugarte-Greedo; and of course they're fighting over a celebrated artificial "Falcon".

(Edit: according to Phil Tippett who did the initial character design for the RotJ Jabba puppet, when he asked Lucas directly "if there was an actor that was going to play Jabba the Hutt, who would it be?" Lucas answered "Sydney Greenstreet". https://www.youtube.com/watch?v=3GXrQ-L-ROs&t=599s )