Milos Prudek writes: > > I am following the Zope development since 2.1.6 up to Zope 2.5.1 > > (usually the CVS branch). > > > > I had no or negligible work with these upgrades with two exceptions: > > Do you use ZClasses? I do. > Upgrading ZClasses from Zope 2.4.x to Zope 2.5.x was a real pain. I never had ZClass problems while upgrading. Dieter