similar problem: Bridge Constructor. Rust.
Updated to Catalyst 14.3 beta V1.0 on Arch Linux 64bit.
With Catalyst 14.4 RC, I can play Unity3D games again. :-)
2 graphics card, that's the problem! if not crossfire mode
If remove one card of xorg.conf - all started!
I think if crossfire=on then all will be well.
But I need configuration two graphics card.