Site icons on my profile page look wrong. (You won't see those icons on my page, so the link leads to yours).
Looks like they're cut from a single long image and the "cutting frame" is shifted down a little.
^^^ here and here ^^^
This doesn't happen on Meta SE but does on SO, ru.SO, sqa, etc. The same problem is in the communities dropdown list:
OS X, FF 47.0, userscripts switched off, cache cleaned.
Same reported on Meta SO: Favicons on Hot Network Questions are off center
I'd changed link to all.css manually, but the problem persists.