I have a Sony dual-layer burner. I have repeatedly burned dual-layered discs which only occasionally play in my DVD player. I have tried burning at the lowest possible speed (1x), and it still hasn't fixed the problems. I have used Memorex, TDK, Verbatim, and Sony disks. I don't have this problem with the single-layer discs. Does anyone have any idea what the problem is? FYI...My DVD player is a pretty new Samsung upconvert player.