Could it be that you have some virus then that makes your system not want to run as it should?
I guess you got a crash window and sent a crash report to the author from that one?
I've had this issue with PMAU errors on my Lite-Ons and in that case it seems related to the amount of sectors for a specific disc image. It also happens at the end of the burn in my cases.
http://forum.imgburn.com/index.php?showtopic=7860
In this case you get it at the start of the burn and I've never had a LG burner so it might be the speed that is the issue.
One of the downloads is in English. If you want the multilingual (you want to see what happens during the installation in French/Chinese/Swahili) select that one instead.
If you now adopt the Central European time zone, we then only have to wait for the day you also starts driving on the right side of the road.
http://www.bbc.co.uk/news/uk-12517762
Verbatim works ok with that burner. I have one myself.
If you buy the Verbatims on mail order outside of Sweden, you can get them for a price lower than what you paid for your current ones (if they were bought in Sweden).
Most certainly all those three burns were carried out at 4x, as none of those lower speeds are supported by your system.
Try the 6x and 8x and if that also fails, get better quality media.
Can you write/burn regular DVDs without any issues?
The latest log showed max as write speed, not 3x.
The main issue is that the burn is "crappy" and can be read back.
Perhaps a cleaning disc that cleans the laser lens might help.
Follow step 1 here
http://forum.imgburn.com/index.php?showtopic=14632
When you see the log, just mark the text you want to be copied and copy and past/insert it into a posting window here in the forum.
There is no layer break to be set in Adobe Encore CS4. Only available in DVD.
http://help.adobe.com/en_US/EncoreDVD/4.0/WSbaf9cd7d26a2eabfe807401038582db29-7ebfa.html#WSbaf9cd7d26a2eabfe807401038582db29-7ebba
http://www.avsforum.com/avs-vb/showthread.php?t=1062025