Strange blurred vertical line in my game

Hi all,

I've recorded a gif (of pretty poor quality) to try show the problem quickly with a generated test tile map and you'll notice when scrolling I get a very strange blur in the same part of my screen. It's easier to see when the line goes across the black grid border.

It's obviously much more obvious from my desktop screen!

Has anyone ever seen this or know what causes this?

http://giphy.com/gifs/l0Iy4mKKhnKjaLY1a/fullscreen

 

I also have this problem so at least you are not alone, looked everywhere but still cannot solve it. May be related to something VR? Because of single pass stereo support? I mean, the problem is with regular screen but still.