I've been running three displays on a Sapphire Toxic Radeon 6950 2GB. When I updated Catalyst today, it now gives all three monitors the number 1 when it detects displays: it says one is connected with DP, the other two with DVI, but all three get assigned 1, so Eyefinity ends up being mirrored. I tried an express uninstall, then a reinstall, but the same problem persists. Windows detects them separately, and I can even set it to extend across all three; when I do, Catalyst assigns them different numbers, but when I try Eyefinity it gives them all 1.
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I downgraded to CCC 11.12 and it works again. What kind of developer releases non-beta software that breaks itself?