I'm really surprised no one has replied to this yet! I discuss this discrepancy in my report on the four recent movie reviews. And I give links, details, and a photo from a movie tie-in book to explain why I think Robert Velarde is wrong.
http://www.aslanscountry.com/2010/11/ne ... e-reviews/"David Vallon was cast in this role last August and was interviewed about the role the following month. IMDb validates this cast listing. Of course, they’re not a completely accurate site, but the Narnia blogs certainly are! Plus, we have behind the scenes photos of Vallon as Gumpas. The photo on the left was taken from Quest for the Lost Lords. So what’s going on? Has Vallon’s role been cut from the movie? Is he playing someone other than Gumpas? Or has Robert Velarde made a mistake?"