I came across an interesting article about Prowse being banned from Celebration 5:
http://geektwins.blogspot.com/2010/06/darth-vader-actor-banned-from-star-wars.html
The article also mentions that Prowse claimed (via slashfilm) he's never been paid any residuals from the Star Wars films, due to the typical Hollywood accounting. Can anyone confirm whether that is really the case?
I know Prowse and Lucas haven't really been the best of buddies, to put it mildly, but not paying the guy residuals is a new low for Lucas.