A work in progress using Zope 2.5.1 incorporates Photo 1.2.3. The use is what one would expect. There's a Photo Folder which holds Photos. In my case, the Photo Folder was constructed through the ZMI. Photographs are uploaded from the web using a <input type=file ...> form. The action for the form is a python script that creates a Photo object in the Photo Folder using the passed-in File Object. The form action calls container.manage_addProduct.manage_addPhoto(id,title,file,.. ) which apparently executes correctly, up to a point. Here "container" is the Photo Folder object. The Photo object is constructed and stored in the Photo Folder. BUT, after creating and string the Photo in the Photo Folder, Zope raises a key error on the File Object variable. The traceback isn't very helpful at localizing the error. Zope Error Zope has encountered an error while publishing this resource. Error Type: KeyError Error Value: the_file ... File /var/zope/lib/python/Products/PythonScripts/PythonScript.py, line 302, in _exec (Object: photo_upload) (Info: ({'script': <PythonScript instance at 8b70a88>, 'context': <Folder instance at 8d91b60>, 'container': <Folder instance at 8d91b60>, 'traverse_subpath': []}, (), {}, None)) File Script (Python), line 8, in photo_upload File /var/zope/lib/python/AccessControl/ZopeGuards.py, line 90, in guarded_getitem File /var/zope/lib/python/ZPublisher/HTTPRequest.py, line 847, in __getitem__ KeyError: (see above) File Protections for the Photo Folder allow anyone to Add or change Photos (at the moment). So, I'm at a loss to know where and how this happens. The logic of the Photo Product defers the actual insertion, but it appears to function by value (that is, the data is saved, not the object that contains it). Help much appreciated.