Likely the same error, this time from command line.
But what could be corrupted?

log:

------------------------------------------------------------------------------------------------------------------


D:\munka\dvlp\bzr\adwse\interface\web>bzr  log -v > d:\temp\bzrlog.txt
bzr: ERROR: zlib.error: Error -3 while decompressing data: incorrect data
check

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 912, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1112, in run_bzr
  File "bzrlib\commands.pyo", line 690, in run_argv_aliases
  File "bzrlib\commands.pyo", line 705, in run
  File "bzrlib\cleanup.pyo", line 135, in run_simple
  File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
  File "bzrlib\commands.pyo", line 1127, in ignore_pipe
  File "bzrlib\builtins.pyo", line 2417, in run
  File "bzrlib\log.pyo", line 343, in show
  File "bzrlib\log.pyo", line 367, in _show_body
  File "bzrlib\log.pyo", line 405, in iter_log_revisions
  File "bzrlib\log.pyo", line 866, in _generate_deltas
  File "bzrlib\log.pyo", line 930, in _make_revision_objects
  File "bzrlib\log.pyo", line 955, in _make_batch_filter
  File "bzrlib\log.pyo", line 785, in _convert
  File "bzrlib\log.pyo", line 666, in _linear_view_revisions
  File "bzrlib\repository.pyo", line 2518, in iter_reverse_revision_history
  File "bzrlib\graph.pyo", line 167, in get_parent_map
  File "bzrlib\repository.pyo", line 2663, in get_parent_map
  File "bzrlib\groupcompress.pyo", line 1313, in get_parent_map
  File "bzrlib\groupcompress.pyo", line 1332, in
_get_parent_map_with_sources
  File "bzrlib\groupcompress.pyo", line 1969, in get_parent_map
  File "bzrlib\groupcompress.pyo", line 1941, in _get_entries
  File "bzrlib\index.pyo", line 1358, in iter_entries
  File "bzrlib\btree_index.pyo", line 1167, in iter_entries
  File "bzrlib\btree_index.pyo", line 1121, in _walk_through_internal_nodes
  File "bzrlib\btree_index.pyo", line 962, in _get_leaf_nodes
  File "bzrlib\btree_index.pyo", line 939, in _get_nodes
  File "bzrlib\btree_index.pyo", line 716, in _get_and_cache_nodes
  File "bzrlib\btree_index.pyo", line 1547, in _read_nodes
error: Error -3 while decompressing data: incorrect data check

bzr 2.2.1 on python 2.6.4 (Windows-XP-5.1.2600-SP3)
arguments: ['bzr', 'log', '-v']
encoding: 'cp1250', fsenc: 'mbcs', lang: None
plugins:
  bzrtools             D:\programs\Bazaar\plugins\bzrtools [2.2.0]
  colo                 D:\programs\Bazaar\plugins\colo [0.1.0]
  explorer             D:\programs\Bazaar\plugins\explorer [1.1.1]
  fastimport           D:\programs\Bazaar\plugins\fastimport [0.9.0dev]
  launchpad            D:\programs\Bazaar\plugins\launchpad [2.2.1]
  loom                 D:\programs\Bazaar\plugins\loom [2.2.1dev]
  netrc_credential_store D:\programs\Bazaar\plugins\netrc_credential_store
[2.2.1]
  news_merge           D:\programs\Bazaar\plugins\news_merge [2.2.1]
  pipeline             D:\programs\Bazaar\plugins\pipeline [unknown]
  qbzr                 D:\programs\Bazaar\plugins\qbzr [0.19.2]
  rewrite              D:\programs\Bazaar\plugins\rewrite [0.6.1]
  svn                  D:\programs\Bazaar\plugins\svn [1.0.4]
  upload               D:\programs\Bazaar\plugins\upload [1.0.0dev]
  xmloutput            D:\programs\Bazaar\plugins\xmloutput [0.8.7.dev]

*** 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.



// On an other pc in bazaar explorer we just got an "out of memory" error by
retrieving the log.