The other posters in this thread are NOT having the same problem as schwam.
Schwam has a dual-LINK DVI display, that means it's using both channels of the DVI cable. That's completely different from "dual DVI" which means two DVI connectors.
Dual-link DVI is ONLY used for resolutions greater than 1900x1200. The only displays in the world that require dual-link DVI are the 30" panels with 2560x1600 resolution from Dell, Samsung and Apple.
If you have some other monitor you may have issues with HDCP but they aren't the same cause as schwam's. The problem with the dual LINK displays is that HDCP doesn't work over dual link.
The reason some of you are able to bypass the HDCP compliance test by using RGB output is because RGB analog is exempt from the copy-protection rules due to the huge installed-base of RGB analog computer monitors. The rules only apply to DVI/HDMI digital and YPbPr Component analog.
Owners of 2560x1600 dual-link displays such as schwam and myself do NOT have this option, because these monitors ONLY accept DVI input. They have no analog inputs whatsoever.