I installed FC3 on a new Averatec 6200 with a 15.4" wide screen.
I did the text based install but when I reboot grub comes up ok, and the boot process is ok until the graphical display tries to come up. Then I just get a blank screen.
I booted into single user mode (command prompt) and edited the /etc/X11/xorg.conf file. I added "1280x800" to the display modes line but id didn't help.