"Because there are some backward incompatibilities, we will prepare a document describing the incompatibilities, with guidance for identifying and making necessary changes." http://www.zope.org/Wikis/DevSite/Projects/Zope2.8/RiskFactors Has that document been published as I am having a problem with an older product in Zope 2.8.4. Jake -- http://www.ZopeZone.com