bzr crashes on push to ftp site

I set up a trivial local repo with a single file using bzr init, then tried pushing it to my webhost.

The command and dumps follow:

~/Documents/bzr_brainjam:bzr push ftp://<email address hidden>/test
FTP <email address hidden> password:
FTP temporary error: 451 /test/.bzr/repository/upload/o9z40ltbz1nwfheofmhm.pack: Append/Restart not permitted, try again. Retrying.
FTP temporary error: 451 /test/.bzr/repository/upload/o9z40ltbz1nwfheofmhm.pack: Append/Restart not permitted, try again. Retrying.
bzr: ERROR: exceptions.EOFError:

Traceback (most recent call last):
  File "/Library/Python/2.5/site-packages/bzrlib/commands.py", line 835, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/commands.py", line 1030, in run_bzr
    ret = run(*run_argv)
  File "/Library/Python/2.5/site-packages/bzrlib/commands.py", line 647, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/Library/Python/2.5/site-packages/bzrlib/builtins.py", line 1161, in run
    use_existing_dir=use_existing_dir)
  File "/Library/Python/2.5/site-packages/bzrlib/push.py", line 128, in _show_push_branch
    remember)
  File "/Library/Python/2.5/site-packages/bzrlib/bzrdir.py", line 1255, in push_branch
    repository_to.fetch(source.repository, revision_id=revision_id)
  File "/Library/Python/2.5/site-packages/bzrlib/repository.py", line 1544, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/Library/Python/2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/Library/Python/2.5/site-packages/bzrlib/repository.py", line 3188, in fetch
    pb=pb, find_ghosts=find_ghosts)
  File "/Library/Python/2.5/site-packages/bzrlib/fetch.py", line 79, in __init__
    self.__fetch()
  File "/Library/Python/2.5/site-packages/bzrlib/fetch.py", line 105, in __fetch
    self._fetch_everything_for_search(search)
  File "/Library/Python/2.5/site-packages/bzrlib/fetch.py", line 133, in _fetch_everything_for_search
    stream, from_format, [])
  File "/Library/Python/2.5/site-packages/bzrlib/repository.py", line 3953, in insert_stream
    self.target_repo.start_write_group()
  File "/Library/Python/2.5/site-packages/bzrlib/repository.py", line 1615, in start_write_group
    self._start_write_group()
  File "/Library/Python/2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 2278, in _start_write_group
    self._pack_collection._start_write_group()
  File "/Library/Python/2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 2006, in _start_write_group
    file_mode=self.repo.bzrdir._get_file_mode())
  File "/Library/Python/2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 422, in __init__
    self._writer.begin()
  File "/Library/Python/2.5/site-packages/bzrlib/pack.py", line 129, in begin
    self.write_func(self._serialiser.begin())
  File "/Library/Python/2.5/site-packages/bzrlib/pack.py", line 132, in write_func
    self._write_func(bytes)
  File "/Library/Python/2.5/site-packages/bzrlib/repofmt/pack_repo.py", line 415, in _write_data
    _write(bytes)
  File "/Library/Python/2.5/site-packages/bzrlib/transport/__init__.py", line 267, in write
    self.transport.append_bytes(self.relpath, bytes)
  File "/Library/Python/2.5/site-packages/bzrlib/transport/__init__.py", line 1011, in append_bytes
    return self.append_file(relpath, StringIO(bytes), mode=mode)
  File "/Library/Python/2.5/site-packages/bzrlib/transport/ftp/__init__.py", line 398, in append_file
    self._try_append(relpath, f.read(), mode)
  File "/Library/Python/2.5/site-packages/bzrlib/transport/ftp/__init__.py", line 428, in _try_append
    self._try_append(relpath, text, mode, retries+1)
  File "/Library/Python/2.5/site-packages/bzrlib/transport/ftp/__init__.py", line 427, in _try_append
    self._reconnect()
  File "/Library/Python/2.5/site-packages/bzrlib/transport/ftp/__init__.py", line 160, in _reconnect
    connection, credentials = self._create_connection(credentials)
  File "/Library/Python/2.5/site-packages/bzrlib/transport/ftp/__init__.py", line 139, in _create_connection
    connection.connect(host=self._host, port=self._port)
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ftplib.py", line 132, in connect
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ftplib.py", line 207, in getresp
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ftplib.py", line 193, in getmultiline
  File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ftplib.py", line 183, in getline
EOFError

bzr 1.17 on python 2.5.1 (darwin)
arguments: ['/usr/local/bin/bzr', 'push', 'ftp://<email address hidden>/test']
encoding: 'UTF-8', fsenc: 'utf-8', lang: 'en_CA.UTF-8'
plugins:
  bzrtools /Library/Python/2.5/site-packages/bzrlib/plugins/bzrtools [1.16]
  email /Library/Python/2.5/site-packages/bzrlib/plugins/email [unknown]
  extmerge /Library/Python/2.5/site-packages/bzrlib/plugins/extmerge [unknown]
  launchpad /Library/Python/2.5/site-packages/bzrlib/plugins/launchpad [1.17]
  loom /Library/Python/2.5/site-packages/bzrlib/plugins/loom [1.4dev]
  netrc_credential_store /Library/Python/2.5/site-packages/bzrlib/plugins/netrc_credential_store [1.17]
  rebase /Library/Python/2.5/site-packages/bzrlib/plugins/rebase [0.5.4dev]
  search /Library/Python/2.5/site-packages/bzrlib/plugins/search [1.7dev]
  svn /Library/Python/2.5/site-packages/bzrlib/plugins/svn [0.6.3]
  upload /Library/Python/2.5/site-packages/bzrlib/plugins/upload [1.0dev]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.