However, after hours of editing, when finally producing the video I ran into the same issue - portions of the video were simply black! That was independent of the format I produced the video in.
I opened support case CS001830088 to which I even uploaded a demo of the issue. The ticket was still unresolved after 30 days into my ownership of the product, so I asked for a refund, which was processed. Shortly thereafter I received an email from 'Donna' at Cyberlink stating now that my refund was processed they no longer see a need to fix the issue.
Shortly after getting the refund I upgraded my PC which happens to have PD 14 pre-installed. I tried with that right away and the issue was not seen. So this is clearly a regression bug in PD 16. Too bad to learn that the issue is apparently considered fix because I decided not to risk my investment by waiting for a fix to become available seeing there was no urgency behind it in the first place. Sad, Cyberlink!
-Matthias