[Zope] exUserFolder writing on ZODB

Hi! We recently switched to an exUserFolder+MySQL authenticating system because we wanted to avoid user information to be written on ZODB. The problem is that now when a user signs in (above 4000 users) something is being written in the ZODB, (I see it in /manage_UndoForm ) what is exactly what we were trying to avoid... Any switch has to be activated or configured? Any hint will be appreciated. Gari _______________________________________ Garikoitz Araolaza CodeSyntax garaolaza@codesyntax.com Azitaingo Industrialdea 3 K E-20600-EIBAR Tel: +34 943 82 17 80