One of the problems with using Protege frames is when moving classes from one regular superclass to another regular superclass, the corresponding standard class or metaclass assignment is not automatically implemented. Such is the case below when we decided that medial sulcus and sulcus limitans are not material objects but rather spaces and therefore moved them from "region of wall of fourth ventricle' to 'subdivision of cavity of fourth ventricle' but forgot to re-assign their metaclasses. There are probably quite a few of these existing and if you can programmatically generate a list of these please send it to me. I'd appreciate that very much.
WRT to white matter of left hippocampus as child of white matter of right hippocampus, the current copy of the FMA does not have that conflict.