From your log I see AIGLX is enabled, which as I understand fglrx doesn't support - can you try adding to your server flags section to turn off aiglx and see if that makes the issue disappear?
From your log I see AIGLX is enabled, which as I understand fglrx doesn't support - can you try adding to your server flags section to turn off aiglx and see if that makes the issue disappear?