That's not the problem. He's not shaded with the lightsource directly above him, and the proportions seem weird to me. Not sure what it is that's making me think that, though.
I think it's rolento that has an in-depth study of how CvS style works. The rest of the thread should also have some helpful info.
"I should probably call it a night. ...Sure, give me a sword and a throne and we'll make a big thing of it."