It would be a monumental d**k move on Kubica's part to break the contract and frankly I can't see why Sauber would need him when Kobayashi is already a rapid young driver. They need some experience and reliability to back Kobi up...That description suggests Nick Heidfeld.
The Frome Flyer: Smoother, Smarter, Calmer, Winner. Jenson Button: Professor, Chauffeur, World Champion Racing Driver.
Yes I think RK needs to stick to his word and stay with Renault. If all the shannagins are true about him I'm slowly but surely loosing respect for him.
"Sanity and happiness are an impossible combination". Mark Twain