It looks like the CSS selector "span.stars .star" is overriding the font-family from the normal "body, div, ..." selector, resulting in an inconsistent font for the "(vote up)" link.

Potential fix:
 span.stars .star {
-    font-family: "Zapf Dingbats", "Apple Symbols", sans-serif;
+    font-family: "Zapf Dingbats", "Apple Symbols", verdana, sans-serif;
 }

Are you using Linux? Seems a long standing issue https://konachan.com/forum/show/80867

I get the stars just fine; it's only the "vote up" text that's incorrect.

I'm not blocked at all, though. Everything works fine. Just a minor graphical bug.