bzr: ERROR: bzrlib.errors.UnlockableTransport: Cannot lock: transport is read only: <bzrlib.transport.http._urllib.HttpTransport_urllib url=http://bazaar.launchpad.net/%7Eubuntu-core-doc/ubuntu-doc/xubuntu-hardy/.bzr/repository/>

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 817, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 779, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 477, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 792, in run
    br_from.set_push_location(br_to.base)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 2033, in set_push_location
    self._set_config_location('push_location', location)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 594, in _set_config_location
    config.set_user_option(name, url, warn_masked=True)
  File "/usr/lib/python2.5/site-packages/bzrlib/config.py", line 646, in set_user_option
    self._get_branch_data_config().set_option(value, name)
  File "/usr/lib/python2.5/site-packages/bzrlib/config.py", line 882, in set_option
    self.branch.lock_write()
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 1329, in lock_write
    repo_token = self.repository.lock_write()
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 307, in lock_write
    result = self.control_files.lock_write(token=token)
  File "/usr/lib/python2.5/site-packages/bzrlib/lockable_files.py", line 258, in lock_write
    token_from_lock = self._lock.lock_write(token=token)
  File "/usr/lib/python2.5/site-packages/bzrlib/lockdir.py", line 556, in lock_write
    return self.wait_lock()
  File "/usr/lib/python2.5/site-packages/bzrlib/lockdir.py", line 485, in wait_lock
    return self.attempt_lock()
  File "/usr/lib/python2.5/site-packages/bzrlib/lockdir.py", line 450, in attempt_lock
    raise UnlockableTransport(self.transport)
UnlockableTransport: Cannot lock: transport is read only: <bzrlib.transport.http._urllib.HttpTransport_urllib url=http://bazaar.launchpad.net/%7Eubuntu-core-doc/ubuntu-doc/xubuntu-hardy/.bzr/repository/>

bzr 0.90.0 on python 2.5.1.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'push', 'bzr+ssh://jwcampbell@bazaar.launchpad.net/~ubuntu-core-doc/ubuntu-doc/xubuntu-hardy']

** please send this report to bazaar@lists.ubuntu.com