You have: bzr 2.3.5dev and qbzr[0.23.1dev]
From README: http://bazaar.launchpad.net/~qbzr-dev/qbzr/trunk2a/view/head:/README.txt#L31 QBzr 0.23 is targeted to bzr 2.6 and compatible with bzr 2.5 It may not work with older versions of bzr.
For bzr 2.3.x you need qbzr 0.21.x.
You have: bzr 2.3.5dev and qbzr[0.23.1dev]
From README: http:// bazaar. launchpad. net/~qbzr- dev/qbzr/ trunk2a/ view/head: /README. txt#L31
QBzr 0.23 is targeted to bzr 2.6 and compatible with bzr 2.5
It may not work with older versions of bzr.
For bzr 2.3.x you need qbzr 0.21.x.