..im having huge problems with this, coasters all around. wont play on my dvd, only on some car-radio's at my work or some of the mini-systems etc. Nero will report an error "writing on this disc could results on a bad burn" or something along those lines. it burns anyway, you can only press "OK", which btw is utterly retarded imo.
Anyway, didnt have this problem before I swapped my cd writer for this dvd burner. tho I patched my 451 to a 851 this is of no effect, the problem occurs with both firmware's. Nero isnt at fault either, Ive been using it with the other drive with no problems. I did change media tho, but they are fine for data and such...and do play on some players.