I've been testing this for about a week. I created a coaster on my second try. With prices of DVD+R media still high, that was an expensive mistake.
Went on to create two more coasters after that. I was using Philips media.
Then Liteon recently released firmware for this drive - ver DR4ES0E(
http://www.liteonit.com/english/english ... rmware.htm). After applying the firmware, I no longer have burning problems. In fact, one of the coasters became readable again after the firmware update.
The firmware desc on the update only says "Match more media".
My feeling is that DVD burning is still in the early days, so you can expect "version 1.0" products and teething problems. I'm talking about all DVD burners, not just Liteon.
In fact, one retailer even asked me to hold off purchasing DVD burners, as prices of both the drives and media are expected to drop in the next few months.
If you HAVE to buy a drive now though, make sure it has the latest firmware.