The Jabba of ROTJ was not the sort of creature that would turn up in the heat and bustle of Mos Eisley to collar a smuggler when he had already sent out a bunch of hired guns to deliver his message. The Jabba of ROTJ was so fat that I doubt he went anywhere under his own steam anyway. He certainly wouldn't have put up with anyone being so disrespectful of him as Solo is in that scene. The dialogue is off as well, I think. The Jabba in that scene doesn't speak in the same way as the Jabba in ROTJ.
The scene should have been left out, I think.