Vadjust is adding lines at end of v_counter, so after V-SYNC. So it is adding a black line. Question : are all Vadjust line black ones ?
In r005.8.12, -LittleOne demo raster arrives one line too late, and prehistoric II seems hiding line one line too late resulting a pixel-garbage line. This same pixel-garbage line are visible in somes demo, like Blocus, Batman Forever (several times one pixel-garbage line) and battro (10 following pixel-garbage lines in this last one)