is it my eyesight or have all the app screenshots (bottom right) on the loader gone fuzzy ?

Anyone else? I don't think anything has changed in the code, and looking at the image with Chrome devtools shows there's nothing odd there - it's just an img tag with a size of 4em. I guess Chrome could have changed its scaling algorithm but it seems unlikely.

If the image size were set in pixels to a multiple of 176px (like 88px) then the rendering would be a bit better for most screenshots, but then it wouldn't scale nicely on different devices like phones.