Re: 100.14.09 with 8600GT - random lockups
From a quick look at your log I saw this:
(II) Module glx: vendor="X.Org Foundation"
compiled for 1.3.0, module version = 1.0.0
ABI class: X.Org Server Extension, version 0.3
This is not correct, it should load the glx file from NVidia that is why X restarts when an app tries to use glx.
Check the libglx.so in /usr/lib/xorg/modules/extensions, it should be a symbolic link to libglx.so.100.14.09 in the same folder.