I have been trying to get LiteOn support to understand a problem with the 5S and 6S drives not writing -R Lead-In properly. I have not made much progress with them and I’m not sure they understand what I am trying to point out. Simply put the Lead-In area is too wide. This is causing recognition problems with some players and DVD drives. This very same problem has happened in the past with the 411/811 and 451/851 drives. It was eventually fixed with a firmware update. I can provide additional details if needed and have some pictures good Lead-In’s vs. bad Lead-In’s. I would really like to see this fixed otherwise I have 4 5S and 6S series drives that I simply can’t trust to produce proper -R burns.