[Zope] Instance methods overriding ZClass methods

In http://www.egroups.com/list/zope/md1354197722.html, Jephte CLAIN noted some interesting behavior when you try to add a DTML Method in an instance that overrides a DTML Method in the ZClass. As of now (2.0a4, which I am geniunely running now), you cannot add a DTML Method of the same name as one that exists in the ZClass itself. I didn't see anything in the Collector on this. Is this the desired behavior? Kevin