Wow, are you serious? Does this happen with all ATI cards?
From what I can tell all 5,000 series cards work this way. It is on ATI's forums that you need the edit the registry to get a CRT working above 60Hz.
I have friends that have the 4,000 series cards from ATI and the FW900 but they work great.
My card will go up for sale if I test the new nVidia DX11 card and it works with DVI to BNC the way my 8800GTS did.