Using this drive with a Vaio laptop before flashing, never had a problem. Used Memorex 8x disks at 8x speed and never made a coaster. After flashing the drive, everything works fine except the Memorex 8x will only burn at 6x with Nero. Sony 8x media works fine and burns at 8x. HP 4x RW burns fine at 4x. What's up with the Memorex? Is this by design or buggy firmware? Does this firmware recognize inferior media?