Could you run a couple of commands as root ?
I wonder if it is trying to run firstboot at all :
# /sbin/chkconfig --list |grep firstboot
firstboot 0:off 1:off 2:off 3:on 4:off 5:on 6:off
# cat /etc/sysconfig/firstboot
And as any user, I wonder how many packages were installed :
$ rpm -qa |wc -l