Comment 2 for bug 980456

Sure. I see the problem with today's build at:
 http://uec-images.ubuntu.com/precise/20120423/precise-server-cloudimg-armhf-disk1.img

Running the qemu-nbd command gives:

[24141.298818] nbd0: p1
[24141.298848] nbd0: p1 size 1638630 extends beyond EOD, truncated

but it does mount OK:

sudo mount /dev/nbd0p1 /mnt
[24312.910516] EXT4-fs (nbd0p1): mounted filesystem with ordered data mode. Opts: (null)

That may be due to luck :)

And some versions:

michaelh@crucis:~/Downloads$ qemu-nbd --version
qemu-nbd version 0.0.1
Written by Anthony Liguori.

Copyright (C) 2006 Anthony Liguori <email address hidden>.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

michaelh@crucis:~/Downloads$ dpkg -l qemu-utils
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-====================-====================-========================================================
ii qemu-utils 1.0+noroms-0ubuntu13 qemu utilities

This is on Precise x86_64.