However, the new code is actually worse than the original. Not only are the solid black lines still in the bottom and right, but the scanlines themselves are completely trucked.
If you hover over the image, you can see the difference between the old and the new. The scanlines are completely off now. Those screenshots were taken with identical configuration settings.
I'm on IRC if there's anyone willing to try a few things with me there to get it fixed in a short amount of time.