Saved settings are not used after log in/reboot/x server reboot
Binary package hint: nvidia-settings
It seems like this has been a long lasting issue that should perhaps be fixed :S
Anyhow, after installing the 17* (was it 9 or 6?) drivers, my resolution, after being changed, applied, and saved to /etc/X11/xorg.conf from the nvidia-settings control panel, is not used if I either log off then on again, restart X (Ctrl Alt Backspace), or restart my computer. The settings will only stay for the current session.
I am using a NVIDIA GeForce FX 5500, with Linux Mint 9 (Kernel: 2.6.32-24-generic (i686))
Attached are my xorg.conf files before and after I apply the settings.