Have you had any luck with this?
The numbers of lines is just equal to 180 / SP.VerticalAngularIncrement value. I have the same problem, though changing the vertical increment just crashes my editor < 22.5. Also find that unless SP.VerticalAngularIncrement and SP.CaptureHorizontalFOV are the same value I also get a crash.
Were able to get past the black lines? Changing SP.VerticalAngularIncrement to 90 reduces the lines, but it does have a minor negative effect on the stereo rendering quality.