Also: /Library/Openskos2/OaiPmh had conflicts which I resolved by accepting "my" version of code: using getSchemeBySetUri instead of getSchemeByCollectionUri. Never tested.
It is assumed that dc is not in use any more, but dcterms or other namespaces. check if it is the case, since dc-repfix is removed from solo's schema.xml and if dc is still used somewhere we can have problems.