[Zope-dev] copy&past question about zdiscussions

I found that the ZDiscussions componet can't be copy&paste with ZDItems in it,because the ZDItem is not a addable object out of the ZDtopic. I manage to pull the ZDItem out of the ZDTopic,and the ZDTopic can work well as before.but when I add a ZDItem in a Folder,the system reports an error,anyone else notice the problem?