[Zope] strange behaviour with zclass method and emacs

[Oliver Frommel]

Hi,

while editing Zope content with Emacs I discovered the following strange
behaviour: There's a ZClass (base classes ZObject, ZDTMLDocument and 
container, which itself has the base classes ZObject, CatalogAwareBase,
ZObjectManager) containing three DTML documents at this moment.
Now I can edit two of them with no problem, while opening index_html always
tells me (New File). However this file already exists and is editable via
the management interface. The former version of index_html, now called
index_html_simple is editable normally, also the other DTML document.
The index_html of the ZClass "container" is also editable from Emacs with
no problems.
Is this a bug?
I am running Zope 2.3.0 and Linux on the Server, GNU Emacs 20.7.1 
(i386-suse-linux) as a client.

--Oliver