[Zope] manage_changeProperties not failing when using incorrect propertysheet

manage_changeProperties, when called on a sheet that does not contain properties specified in manage_changeProperties argument, does not throw an error. It seems to execute succesfully, but the properties do not get updated. At least for Zope 2.4.3. Example: Two propertysheets, "Elvis" and "Priscilla". "Elvis" contains property "age". "Priscilla" does not contain property "age". propertysheets.Priscilla.manage_changeProperties(age=20) will execute without errors, but it will have no effect at all. I believe that it should not execute and that it should throw an exception/error. -- Milos Prudek