Description of problem:

After installing a new domain via xenguest-install.py, using current rawhide,
which appears to complete successfully via vnc, starting the domain fails with:

# xm create -c xt5
Using config file "/etc/xen/xt5".
Traceback (most recent call last):
  File "/usr/bin/pygrub", line 256, in ?
    cf = get_config(file, isconfig)
  File "/usr/bin/pygrub", line 139, in get_config
    raise RuntimeError, "Unable to read filesystem" 
RuntimeError: Unable to read filesystem
Error: Boot loader didn't return any data!


*** This is the output from the install:

XKB extension not present on :1
setsebool:  SELinux is disabled.
sending termination signals...done
sending kill signals...done
disabling swap...
        /dev/mapper/VolGroup00-LogVol01
unmounting filesystems...
        /mnt/runtime done
        disabling /dev/loop0
        /proc done
        /dev/pts done
        /sys done
        /tmp/ramfs done
        /mnt/sysimage/boot done
        /mnt/sysimage/proc done
        /mnt/sysimage/sys done
        /mnt/sysimage/dev done
        /mnt/sysimage done
rebooting system
Restarting system.
libvir: Xen Daemon error : GET operation failed: No such domain 3
If your install completed successfully, you can restart your
guest by running 'xm create -c xt5'.


***
Config file and 'file' output for the disk image:
# Automatically generated xen config file
name = "xt5"
memory = "444"
disk = [ 'file:/opt/xen/xt5-disk,xvda,w' ]
vif = [ 'mac=00:16:3e:20:e9:5f, bridge=xenbr0' ]
uuid = "16129854-8ef8-e246-48be-c347d2ab0d53"
bootloader="/usr/bin/pygrub"

on_reboot   = 'restart'
on_crash    = 'restart'


# file /opt/xen/xt5-disk
/opt/xen/xt5-disk: x86 boot sector; partition 1: ID=0x83, active, starthead 1,
startsector 63, 208782 sectors; partition 2: ID=0x8e, starthead 0, startsector
208845, 3984120 sectors, code offset 0x48