Look at my thread above. Greesing the rails fixed my reading and writing problems on the LG 4081B, possibly same issue here. I dont think its an LG problem, its something that should be done ONCE out of warranty. I guess LG doesnt put enough greese, I put some white greese (high heat resistant) on the rails (i mean alot more then usual I guess) and so far the drive is dame quiet, really quick (not as quick as my benq 1620pro) but much better then before
give it a try if your burners out of warranty.