import refuse to import some tarballs

# LANG= bzr import cdk_avr_libc-1.4.4-i686-1.tgz avr-libc
bzr: ERROR: Tree transform is malformed [('overwrite', 'new-0', '')]
#

bzr.log:

Mon 2009-11-23 14:34:12 +0200
0.130 bzr arguments: [u'import', u'cdk_avr_libc-1.4.4-i686-1.tgz', u'avr-libc']
0.182 looking for plugins in /root/.bazaar/plugins
0.558 looking for plugins in /usr/lib/python2.5/site-packages/bzrlib/plugins
0.560 Plugin name bzrtools already loaded
0.620 encoding stdout as sys.stdout encoding 'ANSI_X3.4-1968'
0.741 creating repository in file:///mnt/hd/a/1/downloads/ATMEL/soft/avr-libc/.bzr/.
0.792 creating branch <bzrlib.branch.BzrBranchFormat6 object at 0xb780394c> in file:///mnt/hd/a/1/downloads/ATMEL/soft/avr-lib
0.840 trying to create missing lock '/mnt/hd/a/1/downloads/ATMEL/soft/avr-libc/.bzr/checkout/dirstate'
0.842 opening working tree '/mnt/hd/a/1/downloads/ATMEL/soft/avr-libc'
0.896 opening working tree '/mnt/hd/a/1/downloads/ATMEL/soft/avr-libc'
3.134 Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 835, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 1030, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/command.py", line 13, in run_argv_aliases
    commands.Command.run_argv_aliases(self, argv, alias_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 647, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/command_classes.py", line 497, in run
    do_import(source, tree)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/upstream_import.py", line 276, in do_import
    import_tar(tree, tar_input)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/upstream_import.py", line 171, in import_tar
    import_archive(tree, tar_file)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools/upstream_import.py", line 244, in import_archive
    for conflict in cook_conflicts(resolve_conflicts(tt), tt):
  File "/usr/lib/python2.5/site-packages/bzrlib/transform.py", line 2633, in resolve_conflicts
    raise MalformedTransform(conflicts=conflicts)
MalformedTransform: Tree transform is malformed [('overwrite', 'new-0', '')]

3.136 return code 3