As for the change of names - I agree - there is a new one. As for its widespread use - some time will pass. Google search shows: potassium hexacyanoferrate(II) - 262,000 results; potassium hexacyanidoferrate(II) - 4,390 results. In German, the proportions of using the newest nomenclature look better: Kaliumhexacyanoferrat(II) - 20700; Kaliumhexacyanidoferrat(II) - 5810.