Unity packaging branch status OUT-OF-DATE

Decided to look into bug #853865. Followed instructions at http://developer.ubuntu.com/packaging/html/udd-getting-the-source.html#branching. Received the following when attempting to branch unity:

[~/Devel/Ubuntu/unity] bzr branch ubuntu:unity unity.dev
The authenticity of host 'bazaar.launchpad.net (91.189.95.84)' can't be established.
RSA key fingerprint is 9d:38:3a:63:b1:d5:6f:c4:44:67:53:49:2e:ee:fc:89.
Are you sure you want to continue connecting (yes/no)? y
Please type 'yes' or 'no': yes
Warning: Permanently added 'bazaar.launchpad.net,91.189.95.84' (RSA) to the list of known hosts.
Most recent Ubuntu version: 7.1.0+13.10.20130802-0ubuntu1
Packaging branch version: 6.12.0-0ubuntu0.2
Packaging branch status: OUT-OF-DATE
Branched 808 revisions.