I got the definite word from Aspyr: "Brave New World will only be supported on OSX 10.7.5 and 10.8.3."
I didn't upgrade to Lion because it would have killed some older software I still use. I will replace it when I get a new machine, but not before.
Why not create a separate Snow Leopard partition for the older stuff?
I did that so I can run older PPC (rosetta) games.