I have experienced X crash also with GeForce 8600 GS and driver 180.29 when visiting that site
I really wonder what is the particularity of that site. The crash also happens when no flash is used.
Has been the 180.37 version of the driver officially released as stable?
I can not found it from the driver download page
and it is not listed on this page
In this list of Current NVIDIA Linux graphics driver releases
the 180.37 is marked as pre-release.
This post, however, is some months ago.
Is it the 180.37 enough stable?