[Zope] etcUserFolder login fails

[Marcus Bergmann]

Hi,

we use the etcUserFolder. The etcUsers is a copy of the /etc/shadow
readable by the UID Zope runs under. All of our user can login and are
happy, except one of them. His entry in the etcUsers looks equal to the
other user entries

 <username>:<crypted password>:::::::

Zope brings me this error message:

---------------------
Zope Error

Zope has encountered an error while publishing this resource.

ValueError

Sorry, a Zope error occurred.

Traceback (innermost last):
 File /local/zope-2.1.6/msconfig/lib/python/ZPublisher/Publish.py, line
214, in publish_module
 File /local/zope-2.1.6/msconfig/lib/python/ZPublisher/Publish.py, line
179, in publish
 File /local/zope-2.1.6/msconfig/lib/python/Zope/__init__.py, line 202,
in zpublisher_exception_hook
  (Object: ElementWithAttributes)
 File /local/zope-2.1.6/msconfig/lib/python/ZPublisher/Publish.py, line
151, in publish
 File /local/zope-2.1.6/msconfig/lib/python/ZPublisher/BaseRequest.py,
line 430, in traverse
 File
/local/zope-2.1.6/msconfig/lib/python/Products/etcUserFolder/etcUserFolder.py,
line 379, in validate
  (Object: RoleManager)
 File
/local/zope-2.1.6/msconfig/lib/python/Products/etcUserFolder/etcUserFolder.py,
line 281, in std_validate
  (Object: RoleManager)
ValueError: unpack tuple of wrong size
---------------------

I dont understand what the error means and I've got no idea how I can
solve the problem :(

Any ideas?

Thanks, Marcus