I had lot of problems with DVD-R and v156, v256 and v356 firmware. Since I use the 0457 firmware version I have no more problems.
Iâ€™ve burned 10 RITEKG04 at 4X with success. All my DVDâ€™s are read on an Honer, Kiss DP450 an P2 DVD players. This firmware seems to be a rock.
The best results I had since I bought my BTC 1008 are with RICOHJPN DVD+R with wich I have no compatibility problems.
Did somebody tried 0557 ?
Sorry for my bad english