fedora 18 gnome-shell core dumps before live system starts

[Bram Mertens]

Hi,

I wanted to give fedora 18 a try so I created a new virtual machine in
virtualbox (host is Windows 7 enterprise 64bit).
I'm using the 32bit live CD but no matter what options I try after the
fedora 18 progress bar I get a black screen followed by the blue
background for a short while and then a window displaying "oh no
something has gone wrong please contact your system administrator".

I've checked the media (troubleshoot check media and start fedora 18)
and it reported no errors.
I tried adding xdriver=vesa and troubleshooting > start with basic
vide driver but I get the same result.

I opened one of the virtual terminals and I'm able to log on as root
so some system is running, but I'm unable to tell if this is the live
system or some anaconda or other installer shell.

/var/log/messages contains reports that gnome-shell core dumped and an
abrt trace has been created.
The only report I found that resembles what I see is
https://bugzilla.redhat.com/show_bug.cgi?id=919669.  In the abrt
report I also see "Process /usr/bin/gnome-shell was killed by signal 4
(SIGILL)" in the reason file.

Is there any other boot option I can try?  Is there a way to recover
from the gnome-shell crash?  Perhaps force fallback mode?

Thanks in advance.

Bram Mertens