For Samsung Origen board, it happens again:

root@linaro-ubuntu-desktop:~# apt-get install bzr python-apt python-setuptools 
Reading package lists... Done                                                  
Building dependency tree                                                       
Reading state information... Done                                              
python-setuptools is already the newest version.                               
python-setuptools set to manually installed.                                   
bzr is already the newest version.                                             
python-apt is already the newest version.                                      
python-apt set to manually installed.                                          
0 upgraded, 0 newly installed, 0 to remove and 22 not upgraded.                
root@linaro-ubuntu-desktop:~# bzr branch lp:lava-test                          
You have not informed bzr of your Launchpad ID, and you must do this to        
write to Launchpad or access private data.  See "bzr help launchpad-login".    
bzr: ERROR: zlib.error: Error -3 while decompressing data: incorrect data check
                                                                               
Traceback (most recent call last):                                             
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 920, in exce
    return the_callable(*args, **kwargs)                                       
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1131, in rur
    ret = run(*run_argv)                                                       
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 673, in runs
    return self.run(**all_cmd_args)                                            
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 695, in run 
    return self._operation.run_simple(*args, **kwargs)                         
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 136, in run_e
    self.cleanups, self.func, *args, **kwargs)                                 
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 166, in _do_s
    result = func(*args, **kwargs)                                             
  File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 1447, in run
    self.add_cleanup(br_from.lock_read().unlock)                               
  File "/usr/lib/python2.7/dist-packages/bzrlib/branch.py", line 2546, in lockd
    self.repository.lock_read()                                                
  File "/usr/lib/python2.7/dist-packages/bzrlib/repofmt/pack_repo.py", line 18d
    self._refresh_data()                                                       
  File "/usr/lib/python2.7/dist-packages/bzrlib/repofmt/pack_repo.py", line 17a
    self._pack_collection.reload_pack_names()                                  
  File "/usr/lib/python2.7/dist-packages/bzrlib/repofmt/pack_repo.py", line 14s
    first_read = self.ensure_loaded()                                          
  File "/usr/lib/python2.7/dist-packages/bzrlib/repofmt/pack_repo.py", line 10d
    for index, key, value in self._iter_disk_pack_index():                     
  File "/usr/lib/python2.7/dist-packages/bzrlib/btree_index.py", line 1005, ins
    if not self.key_count():                                                   
  File "/usr/lib/python2.7/dist-packages/bzrlib/btree_index.py", line 1452, int
    self._get_root_node()                                                      
  File "/usr/lib/python2.7/dist-packages/bzrlib/btree_index.py", line 949, in e
    self._get_internal_nodes([0])                                              
  File "/usr/lib/python2.7/dist-packages/bzrlib/btree_index.py", line 974, in s
    return self._get_nodes(self._internal_node_cache, node_indexes)            
  File "/usr/lib/python2.7/dist-packages/bzrlib/btree_index.py", line 966, in s
    found.update(self._get_and_cache_nodes(needed))                            
  File "/usr/lib/python2.7/dist-packages/bzrlib/btree_index.py", line 743, in s
    for node_pos, node in self._read_nodes(sorted(nodes)):                     
  File "/usr/lib/python2.7/dist-packages/bzrlib/btree_index.py", line 1573, ins
    bytes = zlib.decompress(data)                                              
error: Error -3 while decompressing data: incorrect data check                 
                                                                               
You can report this problem to Bazaar's developers by running                  
    apport-bug /var/crash/bzr.0.2012-07-31T11:02.crash                         
if a bug-reporting window does not automatically appear.                       
root@linaro-ubuntu-desktop:~# 

observed on hardware pack:

http://snapshots.linaro.org/precise/hwpacks/leb-origen/245/hwpack_linaro-leb-origen_20120729-245_armhf_supported.tar.gz

with ubuntu rootfs image:

http://snapshots.linaro.org/precise/images/ubuntu-desktop/321/linaro-precise-ubuntu-desktop-20120729-321.tar.gz