Well i noticed this a day or two ago and got pretty worried, because i dont know anything about it and it looks really wierd.
Sometimes someplaces the pixels "fuzzyfy" themselves and get really blurry, it appears in different places and get clear when i restart the program or select the text, it has happened to pictures also, what could it be?
the red arrows point at the fuzziness
here is a fullscreen where it is clearly visible