I thought I could add an optional date property to my Z Class' property sheet, but no -- it seems Zope requires that you fill in a valid date. Is there a workaround? Isn't this inconsistent with other properties' behaviour, though? Wouldn't it be logical that an empty date value as entered in Zope's management screens would represent "None" or at least a generic "zero" date? -- Alexander Staubo http://www.mop.no/~alex/ "`Ford, you're turning into a penguin. Stop it.'" --Douglas Adams, _The Hitchhiker's Guide to the Galaxy_