I think I've discovered a bug in firmwares US0N and up, CG3E and CG4E.
What happened: I bought 2 printed DVD's with data. Both of them refused to work on my 812s@832s (OS: WinXP sp2) with CG4E â€“ but they work perfectly on some two years old LG (yuck!)! When I unrolled to CG3E and next to US0Q and so on - nothing changed. Everything become all right when I moved to US0F (!). So, I believe that such a problem may exists at least with new firmwares for 812s and 832s, and maybe for other drives which may be crossflashed to it.
Sometimes drive managed to read session information (not every time!), Dvdinfo reported unknown field in ECB, and every time when I inserted that disks, drive struggles to read them, but useless
And last thing: before 'downgrade' Dvdinfo reported different book and media type for one of disks (dvd-rw and dvd-rom correspondingly). After downgrade it reports dvd-rom for both. May be it's a catch?
Bad quality of disks is not the case â€“ after all, speed of reading was around 5.9x.
P.S.: I don't sure about terminology, when I say 'printed' I mean 'assembled serially, on aluminum'