I was discussing the film with a friend a few months ago, and he mentioned that he was certain that the subtitles for the scene between Jabba and Boushh had been altered at some point since the original 1983 release (which he saw in the cinema) as those on every home video release he'd seen since then didn't match his recollections.

In a nutshell, he recalls one of the subtitles containing a four-letter word. This struck me as unlikely for this particular film, but I'm not in a position to confirm or deny it myself - do the subs in the prints you have provide any evidence for this?