I've burned through about 85 ricohjpnr01 discs at 8x, but the last few are burning at 4x even though the selected speed in nero is 8x. The entire disc is burned at 4x. I've burned a couple other types of discs and they'll burn fine at 8x and above. Would the reason be that these discs aren't as good and the drive is automatically lowering the speed? I've also noticed that the disc quality scan results with the discs burned at 4x aren't as good.