At the time when I tried to take a look I got
You do not have permission to access this page. This could be due to one of several reasons:
I thought nothing of it, and just carried on browsing.
What I'm pretty sure is the same thread (http://www.cgtalk.com/showthread.php?s=&threadid=38555&perpage=15&pagenumber=1) was linked on XSIBase. Was the thread shut down at the request of nVidia?
Or do you have custom user permissions set up so on rare occassions, certain threads are only viewable by a certain user group?