I have been searching the forum and have found some posts about media that has to be avoided if using the LDW-811s, but these are spread arround and it is difficult to spot all of them when you need to buy in a hurry.
I was not sure if posting this here or in the media forum, but as it is Liteon only related I think it should go well here. If it fits better in another place a mod can move this post easily.
Using the media in this thread has produced just coasters to several users in the LDW-811s. I have taken info from some threads and the user that has report them.
Please post your bad media entries here (please for this 811s drive only, and maybe for the 411s that is very alike) with some DVD Identifier information about it if possible, and the firmware version that you had at the momment of the coaster.