Pretty obvious for some people. But I didnt do very much testing for this release. AndyM mentioned something to me, but I thought it was a workflow issue. ultimately it was inside MembershipTool.createMemberarea which called the Document factory. which interacts w/ the bare ZODB ;( -- thus not participating in the Workflow.
Plone now comes with a MembershipTool.py that addresses this. and I re-released 0.9.8.
Install.py has also been changed to automagically install this.