First Nikon stopped supporting the direction connection to Cumulus through Nikon View, now it appears that Cumulus 6 breaks the NEF filter that was needed to see large previews. I no longer support or suggest Cumulus as a database for Nikon DSLR users, especially since other products support NEF directly (Extensis Portfolio, for example). The next editions of my books will reflect that advice, and I'll update my site articles shortly.