I was very happy with my Liteon1213@1633 
a great toy!.. But now… I only can write dvds, i cant’s read them, or any else… I Try diferent medias, diferent software (KPROBE HANGS)… but no success… :Z… It’s strange… it only recognise the empty media…
Ps. No Costers 
… they play very well in my cyberhome!