nope, i'm just using the radeon drivers that my fc5 installation defaulted to. thanks for posting though.
funny thing is, i thought getting clone mode to work properly would be pretty easy since i'm seeing all these posts by people who are trying to get their spanning desktop dualhead stuff to work, complaining that they end up only seeing a replica of the primary screen on their external monitor.. which is exactly what i want.. ahr, the irony