I doubt very much it is a bug. Plug & Burn is not a very good way to make a DVD of your DV video from the camcorder. Even though you may have a very fast computer a whole lot of other things also come into play. Are you running any other apllications, anti-virus checking etc. at the same time. These can all effect the final result. When using Plug & Burn, the program, I believe, captures the video, encodes it for DVD and burns it. When there is motion, a lot of encoding has to be done and I am sure you lose a lot of quality at that point. I always first capture to my hard drive in avi format and then burn to iso file. Only then do I use Disc Copier to finally burn to a DVD. This I believe will give you the best quality.