[ec2-beta] trouble with mounting snapshot volume on ami-814aaee8

[matzseiji]

A volume created with a snapshot can't be mounted.
Seems to be only on 32bit ami-814aaee8, not on 64bit ami-a84aaec1.
Following steps are working on 64bit ami-a84aaec1 and on
ami-1a5db973(by Mr. Eric Hammond).

Steps to reproduce

1st
	create an empty volume, create ext3 filesystem, mount, and write
something, then umount.
2nd
	take a snapshot.
3rd
	create a new volume based on the snapshot created at 2nd step on the
same zone as 1st step.
4th
	mount the new volume.
got following errors.
==
root at ubuntu:/# mount -t ext3 /dev/sdg /snap2
mount: wrong fs type, bad option, bad superblock on /dev/sdg,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so
==
syslog
==
Feb 12 20:59:48 ubuntu kernel: [ 1005.165256] VFS: Can't find ext3
filesystem on dev sdg.
Feb 12 21:00:01 ubuntu console-kit-daemon[4702]: CRITICAL: cannot
initialize libpolkit
Feb 12 21:00:01 ubuntu /USR/SBIN/CRON[4765]: (root) CMD ([ -x
/usr/sbin/update-motd ] && /usr/sbin/update-motd 2>/dev/null)
==

bug?