**** UPDATE ***** 7.7.11
My Samsung burner no longer swallows more recently, these blanks. He has half a spindle burned, then only error. Have cheap Platinum blanks tested, worked immediately. Firmware brought up to date, without success. Now I have the burner replaced by Plextor. Lo and behold, everything super. The blanks are fired again. Apparently Sony currency exchange also the manufacturer, or has quality fluctuations in the batch ...