I'm having the same problem. Eyefinity worked in the Demo for me at 5760x1080, but now that I've bought the game it shows only on the center screen. I tried rebooting, re-creating my eyefinity group, and running at bezel corrected and uncorrected resolutions. I bought the pack that includes the DLC - is it possible Eyefinity support came OUT of the game accidentally since the patch that added it?
I'm running Win7X64, Core i7, 2X 6870's, Catalyst 11.11c. Any ideas/suggestions?