the point is my LG used to burn the MBIPG101R03 media in large quantities (like ~200 of them) with excelent results (see prostore_old_burn_good.PNG). My colleague still gets very good results with the media on his LiteOn
Another friend of mine also has the LG4163, I will test MBIPG101R03 on his drive.
I also will get MCC/verbatim and let you know result, this will show if the LG became physically defective
If it is not defective, my guess it has "learned" the MBIPG101R03 media in some funny way (my problem started with A102 so it excludes version issue)
Anyway, it is frustrating, I bought LG based on excelent reviews after quality problems with my LiteOn. In the beginning the results we according (some no name cheap media with PI/PIF 10/100 stable across all DVDs)
Thank you all for help/hints