<A target="_blank" href="http://www.thenewdominoadmin.com/blog/?p=927&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheNewDominoAdmin+%28The+New+Domino+Admin%29">Marc Champoux found an issue with using Smart Upgrade to move R7.0.1 CCH2 clients</A> to R8.5.1 FP1. He's posted some information and even provides a work around.