Most burning or playback problems are usualy media related, using cheap low quality media, other causes would be burning to fast, not upto date firmware, older burner with newer media where the firmware may not support the newer media. For DVD +R/-R media the only media made in Taiwan that I will buy is Verbatim my fovorite media to use is Taiyo Yuden (not their value line). I have about 12 dvd burners, various brands and only using those two brands of media I would say I only had one defective disc out of maybe 1500 burns. By the way did you get the Plextor 760A burner? Ifso heres a word of advice, if using DV+RW media only use Verbatim, I tried some made in Taiwan Sony and Maxell and the burn reliability wasnt to good, also the 760A isnt very reliable with lightly scratched DVD+RW, if the +RW disc is new it has no problems but if it has some light scratches it either wont recognise the disc and if it does burn to it it may make it unrecognisable. I am currently in touch with a tech support supervisor with Plextor working on the problem, I have experienced this sofar with 3 replacement 760A drives from them. I am waiting to find out what software and media they used to test the last replacement drive with.