[Zope] Missing Properties Tab for File object

One of my users reported that he couldn't update the properties of a File object. It seems there is no tab "Properties" on the manage_main screen for objects of type "File". I know there used to be in Zope 1. Did this get lost in Zope 2? I can't think of any way I could have made it disappear, so I'm thinking DC did it. Was it dropped on purpose? ... or by mistake? There is a workaround: just add /manage_propertiesForm to the end of the URL for the object in question, and -- voila! -- there's the missing form. -- Loren