I had already noticed this error, but it's OK in "enhanced (direct3d 7)" mode. So, the Scanline fullscreen of Mortal Kombat arcade games are perfect in this blitter option. Unfortunately, in several other games, the screen gets smaller when you choose Scanline and, therefore, has black borders in fullscreen. It's a pity, because scanlines is my favorite filter, and I end up not using it in order not to have the screen reduced. I would really like the screen to be filled when using Scanlines.