There's bad blood???? Do tell, I love gossip!
My lcs owner chatted up Tony quite a bit at a con a while back, and his mother, who was there visiting, balked at the mention of Robert and Tony doing a signing together at his store in KY (as they both hail from there) and proceeded to call him many choice names, citing monetary and rights issues related to the show. Tony was a bit more reserved, but he did mention that he nearly had to beg to get his name in the credits and he doesn't get any royalities. He seemed to not want to talk about it, but his Mom let the cat out of the bag.
I'm pretty good friends with the owner, and I don't think he would bullshit about that. But, there's always more than one side to a story.