Icons Are Fuzzy

What browser are you using? Are you zoomed in?

I’m using Mozilla – it seems fine in IE, but fuzzy in Mozilla at normal view. It’s the newest version of Firefox.

Do they look fuzzy to you here (in the footer): https://demo.studiopress.com/eleven40/

On the bottom of the page? No.

CSS from your theme that might be causing it:

.sidebar {
font-size: 14px;
text-shadow: 1px 1px #fff;
}

Ron, are you suggesting I remove or edit that code in some way?

You can try removing it and see what effect it has on your site.