My experience:
I downloaded Fedora-18-Beta-TC1-x86_64-DVD.iso and burned it to a DVD.
Check media was OK!
But if booting (in VirtualBox), it stops in a very early phase. See
the attached screen shots.
Then I booted the DVD on a real machine, it stops with exactly the
same (negative) results.
bootscreen.jpg shows the boot screen, and the other show the output of
the journalctl command (as recommended).
Kind regards
--
Joachim Backes <joachim.backes(a)rhrk.uni-kl.de>
https://www-user.rhrk.uni-kl.de/~backes