Description of problem:
Attempting to boot using the Copy to RAM option.
output is (after a few minutes):
Done copying livecd to RAM
unable to open /etc/mtab: No such file or directory
Bug in initramfs /init detected. Dropping to a shell. Good luck!
Digging around in the shell, I have a /etc/fstab, but not a /etc/mtab
This works fine for me with the current Fedora 7 images