From Bugzilla Helper:
User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.1-0.1.9smp i686)
The rotate option for the nv driver does not seem to be working correctly.
Anything that is past the original screen width is rendered incorrectly.
Steps to Reproduce:
1. Use Option "Rotate" "CCW" in the device, or screen subsection.
2. restart X
Actual Results: Incorrect desktop rendering for portrait.
Expected Results: Portait rendering.
Please upgrade your kernel and your installation to our final release.
Does this problem still happen for you in Seawolf?
Did you try my suggestion?