AttributeError: 'NoneType' object has no attribute 'endswith' in http _redirected_to

Binary package hint: bzr

1)Ubuntu release
Description: Ubuntu 10.10
Release: 10.10
2)Package version
bzr:
  Installed: 2.2.1-0ubuntu1
  Candidate: 2.2.1-0ubuntu1
  Version table:
 *** 2.2.1-0ubuntu1 0
        500 http://in.archive.ubuntu.com/ubuntu/ maverick-updates/main i386 Packages
        100 /var/lib/dpkg/status
     2.2.0-1 0
        500 http://in.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages

3)While trying to branch the code using the command "bzr branch https://www.launchpad.net/randy-qt" got error(attached in the file named as: bzr_bug_report)
4)Expected result:
The branch must have been created

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: bzr 2.2.1-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-27.48-generic 2.6.35.11
Uname: Linux 2.6.35-27-generic i686
Architecture: i386
Date: Tue Mar 8 02:03:28 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: bzr

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 912, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1112, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 690, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 705, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 135, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 1209, in run
    from_location)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 1032, in open_tree_or_branch
    bzrdir = klass.open(location)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 911, in open
    return BzrDir.open_from_transport(t, _unsupported=_unsupported)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 941, in open_from_transport
    redirected)
  File "/usr/lib/python2.6/dist-packages/bzrlib/lazy_import.py", line 125, in __call__
    return obj(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/__init__.py", line 1661, in do_catching_redirections
    transport = redirected(transport, e, redirection_notice)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 931, in redirected
    redirected_transport = transport._redirected_to(e.source, e.target)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/http/__init__.py", line 537, in _redirected_to
    if not target.endswith(relpath):
AttributeError: 'NoneType' object has no attribute 'endswith'