I'll try and gather the information you request. This problem has been going on for quite some time now. I suppose any given spindle can have good and bad discs but I doubt it simply because non of my DL media has given me problems with simple data archiving at any time. It's only burning ISOs (that i've created from VIDEO_TS folders using imgburn), I'm not saying that this is directly relavent nor am I saying that there is a determininistic distinction between how imgburn and NERO get the image burned on the disc because I've not taken the time to develop an expertise in that arena however I can say that I'm an expert at gathering empirical data in a controlled environment given my professional training and the scenario I outline, while not controlled, is repeatable over time.
Once again, i'm not here to complain or get in a peeing contest with over-inflated egos ,,, rather i'm here to gather information ...
Thanks for your time,