I was surprised by your post and then I read the article again. He did indeed sign this new contract in September, while at the same time negotiating with Apple, if the sources are to be believed. He also presumably didn't tell Apple his situation, or else he would have handed his notice in December, and we would merely have heard about this in a few months, if at all. Instead, if BB are suing, he must have just given one months notice, and/or left. Chancer.