critical: 806348 BzrCheckError

[Martin Pool]

https://bugs.launchpad.net/bzr/+bug/806348 seems to be causing a
steadily increasing number of package import failures - if you look at
the failure count graph it is ramping steadily up to the right.  This
could have happened either because of the upgrade of jubany to lucid
or the upgrade of Launchpad to bzr 2.3.3.

So, I've marked <https://bugs.launchpad.net/bzr/+bug/806348> critical,
and we need to get that fixed and out as soon as we can.  Andrew has
made a good start on the analysis on the bug.

Martin