[Zope] Error Type: AttributeError Error Value: __hash__ ??

[Gustav Franzsen]

Have application using LoginManager.  Users log in (username and password).
Data stored in Mysql.  Some users get abovementioned error when attempting
to log in, whilst others have no problem.  No obvious discernable difference
in data in database between users (those that work and those that don't).
Not username/password entry problem either.

What does this error message mean?  Don't see anything in mailinglists on
this.  Don't know where else to look for this one!

We're running:
Zope 2.3.3
ZPatterns 0.4.3
LoginManager0.8.8.b1
mysql 3.23.31.win
ZMysqlDA 2.0.6
MysqlPython 0.3.5
Using IE5.5 and Opera as browsers

Thnx

Gustav Franzsen
Upfrontsystems
Stellenbosch
South Africa