I just wanted to fetch the emacs repository when it threw this error.

y@aao:~/prg/tools$ bzr branch bzr://bzr.savannah.gnu.org/emacs/trunk ./emacs
bzr: ERROR: zlib.error: Error -3 while decompressing data: incorrect data check

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 853, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1055, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 661, in run_argv_aliases
    return self.run_direct(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 665, in run_direct
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 122, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 156, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 1232, in run
    source_branch=br_from)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 1184, in sprout
    result_repo.fetch(source_repository, fetch_spec=fetch_spec)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 1704, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 3438, in fetch
    pb=pb, find_ghosts=find_ghosts)
  File "/usr/lib/python2.6/dist-packages/bzrlib/fetch.py", line 83, in __init__
    self.__fetch()
  File "/usr/lib/python2.6/dist-packages/bzrlib/fetch.py", line 109, in __fetch
    self._fetch_everything_for_search(search)
  File "/usr/lib/python2.6/dist-packages/bzrlib/fetch.py", line 137, in _fetch_everything_for_search
    stream, from_format, [])
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 4279, in insert_stream
    return self._locked_insert_stream(stream, src_format, is_resume)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 4380, in _locked_insert_stream
    hint = self.target_repo.commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 1563, in commit_write_group
    result = self._commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 2314, in _commit_write_group
    hint = self._pack_collection._commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 2148, in _commit_write_group
    problems = self._check_new_inventories()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 633, in _check_new_inventories
    self.repo, inv_ids, parent_invs_only_ids)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 1179, in _build_interesting_key_sets
    for inv in repo.iter_inventories(inventory_ids, 'unordered'):
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/groupcompress_repo.py", line 898, in _iter_inventories
    texts[record.key] = record.get_bytes_as('fulltext')
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 438, in get_bytes_as
    self._manager._prepare_for_extract()
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 538, in _prepare_for_extract
    self._block._ensure_content(self._last_byte)
  File "/usr/lib/python2.6/dist-packages/bzrlib/groupcompress.py", line 151, in _ensure_content
    self._content = zlib.decompress(self._z_content)
error: Error -3 while decompressing data: incorrect data check

bzr 2.1.1 on python 2.6.5 (Linux-2.6.32-25-generic-i686-with-Trisquel-4.0-taranis)
arguments: ['/usr/bin/bzr', 'branch', 'bzr://bzr.savannah.gnu.org/emacs/trunk', './emacs']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  launchpad /usr/lib/python2.6/dist-packages/bzrlib/plugins/launchpad [2.1.1]
  netrc_credential_store /usr/lib/python2.6/dist-packages/bzrlib/plugins/netrc_credential_store [2.1.1]
  news_merge /usr/lib/python2.6/dist-packages/bzrlib/plugins/news_merge [2.1.1]

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.
y@aao:~/prg/tools$

y@aao:~/prg/tools$ bzr --version
Bazaar (bzr) 2.1.1
  Python interpreter: /usr/bin/python 2.6.5
  Python standard library: /usr/lib/python2.6
  Platform: Linux-2.6.32-25-generic-i686-with-Trisquel-4.0-taranis
  bzrlib: /usr/lib/python2.6/dist-packages/bzrlib
  Bazaar configuration: /home/y/.bazaar
  Bazaar log file: /home/y/.bzr.log