I've posted this in FGL also, I figured I could get another viewpoint here.
I'm currently developing a flash game to sell through FGL. There are some sound generation stuff I want to do that it would be better to do it compiling for Flash Player 10.
Since it's a bit new, I'm afraid that if I sell my game, after bidding, Mr. Portal Owner will tell me "Our games are in Flash Player 9, please port it" and I would have to spend extra time cutting stuff back.
According to Adobe,
Flash Player 10 penetration is extremely high, but I don't know if game portals see this or just go on the safe side.
So, from a business point of view, would it be safe to make my game compatible only with Flash Player 10?