I know both of those things. The issue is not:
Running 1080p
The issue is running 1080p in DX10. It works in DX9, and DX10 works in other resolutions.
4870 x2 black bar problem w/dx10 & 1920x1080 (help please)
As was said earlier in this thread, most problems are user/hardware related, rather than driver related. Both rigs in my sig run a 42inch Plasma at 1080P with no problem at all, and have done from day 1 running Vista 64 and DX10.