Here is a debug run of Xorg resulting in the crash:
The symptom happens to be consistent with this bug:
Here is the generated bug report file:
I have installed the NVIDIA driver to my system by manually extracting the .run installer and then copying the files myself. My system is Linux from Scratch, not a distribution. The following makefile was used to install the driver:
My version of EGLIBC is 2.13. Kernel is 3.6.1. Xorg server is 1.12.0. NVIDIA driver is 331.20.