dpush succeeds, but logs error before completing

[n[ate]vw]

Using bzr 2.2.0, bzr-git 0.5.2, dulwich 0.6.1:
$ bzr dpush --remember git+ssh://<email address hidden>/natevw/ShutterStem.git
bzr: ERROR: This operation is not supported by the Git smart server protocol.

HOWEVER, when I go to github, my change has been pushed. It looks like it's just failing because of a revno lookup:

Thu 2010-09-16 15:14:09 -0700
0.070 bazaar version: 2.2.0
0.070 bzr arguments: [u'dpush', u'--remember', u'git+ssh://<email address hidden>/natevw/ShutterStem.git']
0.088 looking for plugins in /Users/nathan/.bazaar/plugins
0.147 looking for plugins in /Library/Python/2.6/site-packages/bzrlib/plugins
0.147 Plugin name git already loaded
0.155 encoding stdout as sys.stdout encoding 'UTF-8'
0.246 opening working tree '/Users/nathan/ShutterStem.git'
4.397 sending revisions set(['<email address hidden>'])
9.183 Packing repository GCRepositoryPackCollection(CHKInventoryRepository('file:///Users/nathan/ShutterStem.git/.bzr/repository/')), which has 3 pack files, containing 5 revisions with hint ['e884c4385f7769fb04c1a4b2f14b0e28'].
9.184 repacking 1 revisions
9.186 repacking 1 inventories
9.187 repacking chk: 1 id_to_entry roots, 1 p_id_map roots, 0 total keys
9.188 repacking 0 texts
9.188 repacking 0 signatures
12.933 Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 911, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 1111, in run_bzr
    ret = run(*run_argv)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 689, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 704, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 135, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/bzrlib/foreign.py", line 339, in run
    push_result.report(self.outf)
  File "/Library/Python/2.6/site-packages/bzrlib/branch.py", line 3151, in report
    note('Pushed up to revision %d.' % self.new_revno)
  File "/Users/nathan/.bazaar/plugins/git/branch.py", line 416, in new_revno
    return self._lookup_revno(self.new_revid)
  File "/Users/nathan/.bazaar/plugins/git/branch.py", line 408, in _lookup_revno
    return self.target_branch.revision_id_to_revno(revid)
  File "/Library/Python/2.6/site-packages/bzrlib/branch.py", line 1037, in revision_id_to_revno
    history = self.revision_history()
  File "/Users/nathan/.bazaar/plugins/git/remote.py", line 350, in revision_history
    raise GitSmartRemoteNotSupported()
GitSmartRemoteNotSupported: This operation is not supported by the Git smart server protocol.

12.934 Transferred: 0kB (0.0kB/s r:0kB w:0kB)
12.934 return code 3