[Zope-dev] ZClasses: invalid id, but id doesn't exist

OK, working on a new product, added a ZClass, inheriting from CatalogAware. Adding a propertysheet, no problem. Adding various properties .... all is fine until I try to add a property called 'summary'. There is no variation of it anyhwere within the product heirarchy (in fact, this is the first thing added!). I'ver even tried deleting the product and starting over. Nada. Any help greatly appreciated. Bill ANderson -- In flying I have learned that carelessness and overconfidence are usually far more dangerous than deliberately accepted risks. -- Wilbur Wright in a letter to his father, September 1900