qinit does not work

Trying to create new branch on LP in 1.9 format I've got this:

C:\work\Bazaar\plugins\scmproj>bzr qinit
Traceback (most recent call last):
  File "C:\work\Bazaar\plugins\qbzr\lib\subprocess.py", line 159, in accept
    self.start()
  File "C:\work\Bazaar\plugins\qbzr\lib\init.py", line 90, in start
    self.process_widget.start(None, *args)
  File "C:\work\Bazaar\plugins\qbzr\lib\subprocess.py", line 368, in start
    self.start_multi(((dir, args),))
  File "C:\work\Bazaar\plugins\qbzr\lib\subprocess.py", line 374, in start_multi
    self._start_next()
  File "C:\work\Bazaar\plugins\qbzr\lib\subprocess.py", line 386, in _start_next
    args = ' '.join(format_arg(a) for a in args)
  File "C:\work\Bazaar\plugins\qbzr\lib\subprocess.py", line 386, in <genexpr>
    args = ' '.join(format_arg(a) for a in args)
  File "C:\work\Bazaar\plugins\qbzr\lib\subprocess.py", line 382, in format_arg
    if a.startswith("-r"):
AttributeError: startswith

QBzr trunk revno.607, bzr.exe 1.11