The typeface "Open Sans" used for user base interface does not support Latin–2. The text looks very inconsistent as glyphs from other fonts are interleaved with glyphs from Open Sans. The extended glyphs are either bolder or thinner, either bigger or smaller than the base glyphs.
Steps to Reproduce:
0. Log in to the user base and set your interface language to Polish.
1. Tell Mozilla Firefox to navigate to the offending location.
1. The text looks inconsistent.
1. Let the text look consistent.
If you disable Open Sans in bootstrap.css, the text looks normal again.
Created attachment 73302 [details]
User Base in Polish with and without Open Sans
It looks right in Konqueror (WebKit).
<URL: http://input.mozilla.org/pl/opinion/3159250 >
Seems fixed. Could you confirm?
I am confirming fixed on major browsers. Mac / Chrome. Ubuntu / Chrome. Ubuntu / Firefox.