Is the symbol “●” in the badges really supposed to look like that?
It’s a glyph in UNICODE, ● 0x25CF BLACK CIRCLE, recently changed from ⚫ 0x26AB MEDIUM BLACK CIRCLE. It looks like a filled disc. If it instead looks like for instance a hollow square, or a square with numbers (and maybe letters ABCDEF) in it, or a question-mark, then all of the below holds: • The font you are using lacks that glyph. • The browser and/or OS you are using is incapable of fetching that glyph from some other font on your system that do have the glyph, so called font/character substitution. Fixing either point above, by using a font that do have the glyph (fixing point 1), or by using a different browser/OS (fixing point 2), will show the correct glyph. The developer uses an OS that does point 2 above very well (though several different fonts are used to show tricky passages of the IPA), so the problem can’t even be triggered.