More fun stuff. Now I am getting this backtrace:

bzr: ERROR: svn.core.SubversionException: ("'/svnroot/openlibraries/!svn/bc/1403/tags' path not found", 175007)    

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 846, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 797, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 499, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 2364, in run
    author=author)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 165, in write_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/workingtree_4.py", line 240, in commit
    result = WorkingTree3.commit(self, message, revprops, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 165, in write_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/mutabletree.py", line 197, in commit
    revprops=revprops, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commit.py", line 387, in commit
    revision_id=self.rev_id)
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 953, in fetch
    return inter.fetch(revision_id=revision_id, pb=pb, find_ghosts=find_ghosts)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/commit.py", line 791, in fetch
    self.copy_content(revision_id=revision_id, pb=pb)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/commit.py", line 755, in copy_content
    while not self.target.has_revision(revision_id):
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/repository.py", line 373, in has_revision
    (path, revnum, _) = self.lookup_revision_id(revision_id)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/repository.py", line 553, in lookup_revision_id
    return self.get_revmap().get_branch_revnum(revid, layout)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/revids.py", line 172, in get_branch_revnum
    for entry_revid, branch, revno, mapping in self.actual.discover_revids(layout, self.cache.last_revnum_checked(str(layout)), last_revnum):
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/revids.py", line 72, in discover_revids
    for (branch, revno) in self.repos.find_fileprop_branches(layout, from_revnum, to_revnum):
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/repository.py", line 806, in find_fileprop_branches
    for (project, branch, nick) in layout.get_branches(revnum):
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/mapping3/__init__.py", line 83, in get_branches
    find_children):
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/mapping3/__init__.py", line 41, in expand_branch_pattern
    return expand_branch_pattern(begin+[todo[0]], todo[1:], check_path, get_children)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/mapping3/__init__.py", line 42, in expand_branch_pattern
    children = get_children(path)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/mapping3/__init__.py", line 72, in find_children
    dirents = self.repository.transport.get_dir(path, revnum)[0]
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/transport.py", line 656, in get_dir
    return conn.get_dir(path, revnum, pool, kind)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/svn/errors.py", line 107, in convert
    raise convert_error(e)
SubversionException: ("'/svnroot/openlibraries/!svn/bc/1403/tags' path not found", 175007)

bzr 1.5 on python 2.5.2 (linux2)
arguments: ['/usr/bin/bzr', 'commit', '-mMerged in gcc4.3 fixes.']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_CA.UTF-8'
plugins:
  bzrtools             /usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools [1.5.0]
  launchpad            /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]
  rebase               /usr/lib/python2.5/site-packages/bzrlib/plugins/rebase [0.3.0]
  svn                  /usr/lib/python2.5/site-packages/bzrlib/plugins/svn [0.4.10]
*** 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.

If appropriate, I'll file a seperate bug but I think this is a direct result of it not finishing the import in one session.