As discussed in the Hardware forum, unable to update the screen resolution via the Control Center (NVIDIA Settings). When accessed, the screen resolution can be set to whatever is supported with the NVIDIA driver. The resolution will hold for the current session only. The difficulty arises when a "save" is attempted for permanent setting retention. Error message on parsing the xorg.conf file.
Mint 8 64 bit - Gnome
Video Card : GeForce 9800Gt
NVIDIA Driver : 185.18.36
Copy the new configuration settings directly into the /etc/X11/xorg.conf file
Possible Root Cause:
Suspect that the dialog in the NVIDIA is not linked to the super user level needed to update the xorg.conf file.