shrink the zed window by one pixel horizontally and one pixel vertically. there's a video on that issue page which shows resizing making the font go in and out of focus, and that tells me that there's something dividing the window height and width by 2 and starting the font rendering there. if you divide by 2 and you get .5, you'll see the blurriness. if you make the window 1 pixel wider you won't get x.5 anymore, you'll get a whole number.

try it and see. i bet that helps/fixes at least some of you suffering from this.