[Zope] 2.3.1 ZClasses problem with QSurvey - createInObjectManager now returns _getob(i.id) vs. _getob(id)

Hi I am trying to figure out why QSurvey fails to add new instances to its RESULTS folder in Zope 2.3.1. The problem seems to be that createinObjectManager has changed its return value from folder._getOb(id) to folder._getOb(i.id) The note in the source says that this is change is about IOBTree ids, of which I have no experience. I am getting "unsliceable object" errors. I am adding a ZClass to a ZClass descended from ZObject and ZObjectManager. I see I did not descend this from Folder. Is this the problem? -- Jim Washington