Description of problem:
After installing Fedora 16 from the Live x86_64 CD with two monitors connected, one of which is actually a TV in another room, the firstboot screen has been displayed on the TV with a blank screen and a mouse cursor on the primary monitor.
This happened using the noveau driver.
It took a few minutes to realise what has happened, sadly disconnecting the TV didn't help and I had to kill Xorg and run firstboot manually from the console with a root login.
It would be helpful if either firstboot was displayed on both screens or a warning message appeared on the screen that it may be displayed on the other one