APRA-38, IDBSP-47 and http://social.technet.microsoft.com/Forums/en-US/sharepoint2010programming/thread/e9c91765-4c35-424d-888d-58e993783855. SharePoint 2010 will become unresponsive if the root organization is set to be its own parent, even though SharePoint does not prevent you from doing so programmatically or via the UI. Both the UI and the object model are affected by this bug. SharePoint considers the root organization to be the first organization with a parent of -1 in its database (ie. how it determines its value of the RootOrganization property). It is operationally and functionally valid for multiple organizations to exist with a parent of -1, and also to be self-referential (ie. their own parent), but doing so on the profile SharePoint considers its root brings about this instability. The connector could account for this functional limitation by preventing the solution from modifying the parent of the root organization. It is then up to solution implementers to ensure the behaviour of their hierarchy is correct.
Estimate includes work initial research carried out already, as well as implementing and testing.
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