Here is the file of the picture in my screen capture above. http://www.image-heberg.fr/files/15211184251079586996.jpg
Regarding the pixel ratio, I get a 1 when I enter the text. Is that the kind of figure I was supposed to get ?
I'm using a Retina Macbook indeed and I first noticed the change without using an external monitor. I've also been using an external monitor and I haven't seen any difference in the bluriness (pictures appear the same way on my original screen and my monitor).
Apparently, a new version (1.1.2) is ready, do you think I should install it now ?
Thanks again !