It doesn't work with 2.0 :(
cmon Luke, I know you know how to add more information to bug reports than this. Provide some output...
Why qbzr version, what error, Luke? Bazaar 2.2.0 will go stable at the end of December.
dev-vcs/qbzr-0.19.3 Unable to load plugin 'qbzr'. It requested API version (2, 2, 0) of module <module 'bzrlib' from '/usr/lib/python2.6/site-packages/bzrlib/__init__.pyc'> but the minimum exported version is (1, 17, 0), and the maximum is (2, 0, 1) The only other version is 0.19.1 which is only a bugfix difference from 0.19.3 in theory, so I assume it's the same.
I raised the version dependencies. Thanks for the report.