Re: strange hangs/crashes w/ 1.0-9746 on Ubuntu
According to your bug report, you're not using the GLX module which ships with the NVIDIA driver:
(II) LoadModule: "glx"
(II) Loading /usr/lib/xorg/modules/extensions/libglx.so
(II) Module glx: vendor="X.Org Foundation"
compiled for 7.0.0, module version = 1.0.0
ABI class: X.Org Server Extension, version 0.2
This suggests that the driver wasn't correctly installed. I'd suggest (re)installing 1.0-9746.