Comment 7 for bug 731391

Cyril Doussin (cdoussin) wrote :

This won't fix the bug in itself, but as a workaround, if you edit /usr/local/bin/bzr and change the first line to use python 2.6, the problem seems to be fixed. I've been able to bind, update and commit using this.

$sudo vi /usr/local/bin/bzr
then replace

So it would appear that the installer is indeed detecting and using python 2.6 instead of the default 2.7.1 on Lion.