Description of problem:

After a fresh install of today's (20090317) rawhide, /etc/grub.conf read:

# grub.conf generated by anaconda                             
#                                                             
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You do not have a /boot partition.  This means that             
#          all kernel and initrd paths are relative to /, eg.              
#          root (hd0,0)                                                    
#          kernel /boot/vmlinuz-version ro root=/dev/xvda1                 
#          initrd /boot/initrd-version.img
#boot=/dev/xvda
default=1
timeout=4
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
# hiddenmenu
title Fedora (2.6.29-0.258.rc8.git2.fc11.x86_64)
        root (hd0,0)
        kernel /boot/vmlinuz-2.6.29-0.258.rc8.git2.fc11.x86_64 ro root=/dev/xvda1 rhgb quiet
        initrd /boot/initrd-2.6.29-0.258.rc8.git2.fc11.x86_64.img

Note that default=1 instead of default=0.  This borks pygrub in xen-3.0.3 (EL 5.2) and the domain won't boot.  No idea what effect if any on physical hardware grub.

Version-Release number of selected component (if applicable):
11.5.0.31
mkinitrd-6.0.81-1.fc11.x86_64