Comment 4 for bug 263300

It looks like there's a fix on this branch::
   http://bazaar.launchpad.net/~menesis/trac-bzr/menesis-dev/revision/50

I'm not sure it's the correct fix, though. I think it's removing functionality to work around the problem. I'm not intimately familiar with either bzr or trac, though, so that might not be a correct assessment.