I use Verbatim BD-R 25, I think they are the best. You guys are correct for blaming the Panasonic BD60, but I did upgrade the Firmware to the latest 2.2. I thought that would do it, but it's still a no go. Before the BD60 I had a Panasonic BD35, and thought I had a lot of Coasters trying to Back-up "TransSiberian," but it turned out to be a defective Blu-ray Player. I shipped the defective BD35 back to Panasonic to have it repaired, and bought a BD60 to replace it. Well all those Coasters turned out to be good. So now I think I have two Back-ups of this "Battle for Terra," that are probably good.