[et-mgmt-tools] TypeError: sort() takes no keyword arguments

[Martin Minka]

hello,
I installed Cobbler on CentOS 4.5, but "cobbler check" (but also 
"cobbler") returns error: "TypeError: sort() takes no keyword arguments".

# cobbler
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/cobbler/cobbler.py", line 719, 
in main
    BootCLI(sys.argv).run()
  File "/usr/lib/python2.3/site-packages/cobbler/cobbler.py", line 42, 
in __init__
    self.api = api.BootAPI()
  File "/usr/lib/python2.3/site-packages/cobbler/api.py", line 40, in 
__init__
    self.deserialize()
  File "/usr/lib/python2.3/site-packages/cobbler/api.py", line 170, in 
deserialize
    return self._config.deserialize()
  File "/usr/lib/python2.3/site-packages/cobbler/config.py", line 169, 
in deserialize
    if not serializer.deserialize(x,topological=True):
  File "/usr/lib/python2.3/site-packages/cobbler/serializer.py", line 
79, in deserialize
    datastruct.sort(cmp=__depth_cmp)
TypeError: sort() takes no keyword arguments
zsh: exit 1     cobbler

Please help me to fix this problem.

Best regards,
Martin Minka