I did finally loose the streaks, but I'm not sure what did it. I'm leaning toward replacing the DLL which goes into a system folder (I can't recall, but I think it's part of the FFT package?). As I mentioned above, I downgraded AVISYNTH, re-upgraded without any success. I went back and completely wiped out my plugins and re-downloaded all of them from the links G-Force put in this thread, and something there solved it. I've re-rendered the lagarith version, but have been busy doing a quick downconvert of Adywan's corrected ESB to DVD, and haven't done the mpeg encode yet to the v4 ESB. Good luck!