Remember the Han Solo novels written by Brian Daley? Where Han and Chewie were hanging around with a labor droid named Bollux?
When I was doing my junior year abroad in England, I saw one of those novels in a store, and I leafed through it for old times' sake. I saw that the labor droid's name was given as "Zollux." At first I thought that was a typo, but it was Zollux all the way through the book.
"That's odd," I said to my friend. "Why would they change a character's name by just one letter?"
"Why, what was his name before?" she asked me.
"Bollocks!" I said, or so she thought, and she almost fell down laughing.