This bug was fixed in the package lxc - 0.7.4.2-3ubuntu6
---
lxc (0.7.4.2-3ubuntu6) oneiric; urgency=low
* Add lxc-start-ephemeral by Robert Collins (LP: #807351)
* Add a --quit-on-stop arg to lxc-monitor for use by lxc-start-ephemeral.
* Modify lxcguest.conf to clear out
updated script that handles slower startup and doesn't leak LXC_DIRs
** Attachment added: lxc-start-aufs
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/807351/+attachment/2251192/+files/lxc-start-aufs
** Attachment removed: a script to bring up and remove aufs layered containers