Hello, I ran into this also and found these notes to explain why this is suddenly an org value and how to fix it:
http://search.sap.com/notes?id=0001580048
http://search.sap.com/notes?id=0001739055
Basically, GRC 10 add-on makes the user group an org value and the note instructs how to undo this manually, but there is a required pre-requisite because you cannot modify this for SAP delivered fields normally.
You know what else would be nice.... maybe there's a note that explains why Account Type is an org value. It REALLY should not be, IMO.