Issues with vertical oriented screen

[augurolo]

Enabling NegativeScreen on a vertical oriented screen, only the top squared portion of the screen is rendered correctly while the lower part is a copy of the lowest properly rendered line.
When I move and click in the badly rendered area, some glitches and part of screen appear.

This happens regardless of mode selection. My machine is a Windows 7 machine with 2K monitor and NegativeScreen Version 2.6.7770.20156 installed.