Importing some native packages lead to OutOfDateTree errors

For some reason importing some native packages lead to

Traceback (most recent call last):
  File "./import_package.py", line 364, in <module>
    sys.exit(main(*sys.argv[1:]))
  File "./import_package.py", line 351, in main
    import_package(package, distro, package_url)
  File "./import_package.py", line 327, in import_package
    update_db.import_package(local_dsc_path)
  File "plugins/builddeb/import_dsc.py", line 1718, in import_package
    md5)
  File "plugins/builddeb/import_dsc.py", line 1679, in _import_native_package
    native=True)
  File "plugins/builddeb/import_dsc.py", line 1558, in import_debian
    self.tree.commit(message, author=author, revprops=revprops)
  File "<string>", line 4, in commit_write_locked
  File "/usr/lib/python2.5/site-packages/bzrlib/workingtree_4.py", line 241, in commit
    result = WorkingTree3.commit(self, message, revprops, *args, **kwargs)
  File "<string>", line 4, in commit_write_locked
  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 295, in commit
    old_revno, new_revno = self._check_out_of_date_tree()
  File "/usr/lib/python2.5/site-packages/bzrlib/commit.py", line 493, in _check_out_of_date_tree
    raise errors.OutOfDateTree(self.work_tree)
bzrlib.errors.OutOfDateTree: Working tree is out of date, please run 'bzr update'.

So far:

scripts/failures/adduser
scripts/failures/at
scripts/failures/bogl
scripts/failures/cdbs
scripts/failures/cdebconf
scripts/failures/cdebconf-entropy
scripts/failures/dctrl-tools
scripts/failures/debconf
scripts/failures/debhelper
scripts/failures/debootstrap
scripts/failures/debtags
scripts/failures/defoma
scripts/failures/dictclient
scripts/failures/dictdlib
scripts/failures/dictionaries-common
scripts/failures/discover1
scripts/failures/doc-base
scripts/failures/dpkg
scripts/failures/dput
scripts/failures/elilo-installer
scripts/failures/finish-install
scripts/failures/gnome-user-docs
scripts/failures/gsfonts-x11
scripts/failures/gtk-sharp2