Over at Jessica Duchen's classical music blog, there's a piece about how composers like Rachmaninov "should be indivisible from our complete artistic picture of their age."
She goes on to suggest that "Vivaldi, Bach, Mozart, Tchaikovsky and Chopin are just a few of the other towering figures whose works have been set, reset, ripped off, shredded and otherwise bowdlerised...". I've entered a comment suggesting (possibly far too obliquely) that composers have been entitled to do this for hundreds of years. Dana's arranger (above) has even respectfully left the Rachmaninov in the original key...where's the problem? The article is HERE