[Zope] user log-ins not persisting

[nwingfield at che-llp.com]

David,
I have experienced the same problem.  Essentially AUTHENTICATED_USER would
waver between the actual authenticated user and the Anonymous User, with no
logical explanation for the change.  Apparently the problem is related to
the HTTP authentication protocol, and some browsers in particular cause
this phenomenon.  My solution was to use cookie authentication.  See the
Cookie Crumbler product if you would like to try this.  Here is a thread
that deals with this problem:
http://mail.zope.org/pipermail/zope/2001-November/104827.html
Nathaniel