None of my 3rd party screen savers and working after installing snow leopard. I used to use fenetres volantes but when i try and select it i get the message: "You cannot use the Fenetres volantes screen saver on this computer. Contact the developer of this screen saver for a newer version." Are there any good screen savers that work on snow leopard?? And why are old screen savers not working on snow leopard?