I have a simple question - Does Plone support version control of documents? I would have thought it does, as it's a pretty basic requirement of any CMS I would have thought. Can I find the answer quickly though? No. There's a project for Zope version control which hasn't got anywhere since 2001 it appears (though some page were changed this year). It says it's going to be in Zope3, yet Zope3 doesn't appear to support it.
So I'm still searching.