I'm running the latest updates for Ubuntu 12.04 and experience X crashes due to an nvidia driver segfault.
It hapens at random times, but usually when I click a link in firefox, or run a command in terminal.
The report was created with version 295.33, but the segfault still exists in 295.40.
Here is the backtrace: https://launchpadlibrarian.net/100036660/gdb-Xorg.txt
Here is a detailed bug report which should contain all necessary info: https://bugs.launchpad.net/ubuntu/+s...rs/+bug/973096
If there's any more info needed, let me know.