BabaJif that's the case then having a closer look, it didn't work for my vertical case either, there's the same blank line at the bottom with the brain in the corner. (one might argue, well if the brain is there, then it's not a blank line).
“with taskbar, then full screen.”
It doesn't work if one prefers their taskbar at the bottom. It leaves a blank space.(Using auto-hide taskbar property)
Now having another look at Animatrix's screen….no blank line BUT, no brain either…so if SESI goes this way….sooner or later, someone will complain they don't have their brain.