After installing the proprietary Nvidia drivers, my mouse cursor looks like this:

The arrow image is much larger than normal. How can I fix it?
Details
How I installed the Nvidia drivers:
- Install
linux-source,linux-headers-generic, andnvidia-current-updates, then reboot. - Run
sudo nvidia-xconfig. - Run
gksudo nvidia-settings, adjust the absolute position of my two monitors, and save the automatically generatedxorg.conf. - Apply the workaround for bug #1057000 to
xorg.conf, then reboot.
- Install
The cursor size settings referred to in this answer are normal.
The problem does not happen when the mouse pointer is over Amarok or Firefox.