GSA-4160B - A303 Firmware Released

Nope - they appear to be genuine.
see…
http://www.dvd-recordable.org/Reviews+index-req-showcontent-id-128.phtml

Mine were dusty though. I’m buying a hair drier to try sort that out (I don’t have hair!)

Hm. Sorry if it’s real Mitsubishi. But that your MCC disks are dusty sounds just as bad.