About half the time I close the Nvidia X Server Settings program, the window pauses and goes grey before closing/crashing. Afterward, I get the option to send an error report to Ubuntu (which I have done).
I don’t remember this ever happening before with this graphics card (I briefly switched to a newer AMD card for a while).
Ubuntu 12.04.4, 64-bit
Unity Desktop Environment (vanilla)
Asus M4A78LT-M LE Motherboard
Asus BIOS Version 0803
AMD Athlon II X4 645, 3.10 GHz
Nvidia GeForce GT 240
Nvidia Proprietary Graphics Driver (Version 331.38 Post-Release Updates)