With RC I can no longer use my WM5 SmartPhone. In beta 6 i was able to get it to work by switching the phone from RNDIS mode into Serial mode. However, in RC the RNDIS mode still fails but now the serial mode fails too. It syncs the very first time you plug it in but subsequently disconnects and is unable to resync. Restarting OS X, Parallels and the phone all have no effect. I have experienced the same behaviour both on an iMac and a MacBook Pro.