I have a proposal up for discussion on adding hookable callbacks to property events. If you are interested in such topics as property validation, CatalogAware syncing on property changes, etc, please take a look within the next few days. I think this is something that many people could use, so your comments are valued. http://dev.zope.org/Wikis/DevSite/Proposals/PropertyManagerEvents Next week I would like to deliver the patch to implement this, so if you have something to say on this topic speak now! -- | Casey Duncan | Kaivo, Inc. | cduncan@kaivo.com `------------------>