[Mailman-Users] Trouble updating to 2.1b2

[Peer Heinlein]

I tried to Update from Mailman 2.0.12 to 2.1b2, but it seemed, that 
bin/update haven't worked properly!

Now my system is broken down and I get errors like:

Traceback (most recent call last):
  File "/usr/lib/mailman/scripts/driver", line 82, in run_main
    main()
  File "/usr/lib/mailman/Mailman/Cgi/listinfo.py", line 42, in main
    listinfo_overview()
  File "/usr/lib/mailman/Mailman/Cgi/listinfo.py", line 85, in 
listinfo_overview
    mlist = MailList.MailList(name, lock=0)
  File "/usr/lib/mailman/Mailman/MailList.py", line 101, in __init__
    self.Load()
  File "/usr/lib/mailman/Mailman/MailList.py", line 574, in Load
    self.CheckValues()
  File "/usr/lib/mailman/Mailman/MailList.py", line 625, in CheckValues
    for name, pattern, desc, emptyflag in self.topics:
  File "/usr/lib/mailman/Mailman/MailList.py", line 128, in __getattr__
    raise AttributeError, name
AttributeError: topics



When I reinstall 2.0.12 everything is working fine, except the 
admin-passwords don`t work any more. 

How can I fix the data structure and what do I have to do to fix my 
installation to use 2.1b2?

Thanks... Peer