Hello, (I think) there's a very small bug in 'App/special_dtml.py'. In Zope 2.4.1, the line 231 is: if bind_to in ('container', 'client'): I think it should be: if bind_to in ('container', 'context'): The problem shows when subclassing DTMLFile and trying to change the value of "_Bindings_client". The bug is also in the CVS. jdavid