According to your bug report, the problem is that you're requesting invalid modes in xorg.conf. The only valid mode in the EDID for the display is 1280x800@60, yet you've requested 1280x800@80 and 1024x768.
Does this problem persist if you request a "1280x800" mode?
In the future, please do not send/post the same issues to both firstname.lastname@example.org
and nvnews. One method is sufficient, as the same people from NVIDIA monitor both.