I see what peole are saying about the US0Q firmware but I am not seeing the same problems (thankfully). From reading these threads, it sounds more like the drives themselves are hit-and-miss.
I just bought my 812 last Friday and it came with US0J. I was VERY discouraged because the first 2 flix I burnt did not play right (skips, freezes, glitches) on these very good W11s. I visitied this site, found the US0Q firmware, flashed the drive and I have been happy ever since. Never used the US0N version.
I then played with the OmniPatcher and got my R01s to burn at 8x and I was even happier. Especially since the KProbe scans are as good or better than the W11 scan above.
The media I use and that work quite well for me are:
DVD+RW RICOHJPNW11 @ 4x
DVD+RW RICOHJPNW01 @ 2.4x
DVD+R RICOHJPNR01 @ 8x (max)
DVD+R RICOHJPNR00 @ 4x (max)
I have tried these other media:
DVD+RW CMC MAG W01 2.4x
DVD+RW INFODISCA01 2.4x
and they work but I don’t really use them because of the longer burn times. Haven’t scanned them but they still play in my set-top player.
I must say from past experience with my old 2.4x burner, the CMCMAG are very good but the batch of INFODISCs are spotty at best (literally, purple dye spots that cause skips, glitches and freezes).
Don’t know if that helps but good luck and keep us posted…