Comment 3 for bug 712392

You're right about the errors. Apparently I had a full snapshot, but it doesn't make a difference.

Meanwhile, I've had the time to test this. It is easy to reproduce:

- Create a snapshot (1 is enough)
- Cause some I/O, like qemu-img convert (this does /not/ have to be the snapshotted volume)
- Watch your virtual machines crash and/or your system burn

Doing the same qemu-img without any snapshots present is no problem.