nvidia-drivers-1.0.8774 now officially support Xorg 7.1 according to the Nvidia release notes. Therefore, the ebuild line "!>=x11-base/xorg-server-1.0.99" in RDEPEND should be removed.
tested and confirmed working here on xorg-7.1, swapping between resolutions seems a little messed up, but otherwise it works perfectly. Block should be removed...
*** This bug has been marked as a duplicate of 145051 ***