Comment 5 for bug 874218

I have exactly the same problem.
GTX 460 and Nvidia drivers
I'm can take some screenshots or help testing bugfixes if needed.

01:00.0 VGA compatible controller: nVidia Corporation GF104 [GeForce GTX 460] (rev a1) (prog-if 00 [VGA controller])
 Subsystem: Giga-byte Technology Device 34fc
 Flags: bus master, fast devsel, latency 0, IRQ 16
 Memory at f8000000 (32-bit, non-prefetchable) [size=32M]
 Memory at d0000000 (64-bit, prefetchable) [size=128M]
 Memory at d8000000 (64-bit, prefetchable) [size=64M]
 I/O ports at e000 [size=128]
 [virtual] Expansion ROM at fa000000 [disabled] [size=512K]
 Capabilities: <access denied>
 Kernel driver in use: nvidia
 Kernel modules: nvidia_current, nouveau, nvidiafb