Nvidia dual monitor configuration gets lost every time I reboot

I've recently updated (well, borked then completely reinstalled) to 12.04.

I'm running a dual monitor setup, with a Dell U2410 / Dell 2007WFP combination on an HP Elite Book 8560W. The graphics card is an NVIDIA GF108 [Quadro 1000M].

My problem is as follows. I can get the dual monitor setup working fine, but every time I reboot, my machine appears to lose the settings (specifically, the U2410 is disabled, the mouse pointer is locked in the launcher). I have to restate the settings after every launch. I've tried running nvidia-settings as sudo, I've save the changes to my xorg.conf file (see below) but nothing seems to be sticking.

Has anyone had similair issues, or know of a fix? Conf file follows:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 295.33  (buildd@allspice)  Fri Mar 30 15:25:24 UTC 2012

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "DELL 2007WFP"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 76.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "Quadro 1000M"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "TwinViewXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "CRT: 1680x1050 +1920+0, DFP-1: 1920x1200 +0+0; CRT: nvidia-auto-select +0+0, DFP-1: NULL"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

The error message I'm getting is this:

none of the selected modes were compatible with the possible modes: 
Trying modes for CRTC 642:
CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0)
CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0)
CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0)
CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1)
CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1)
CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1)