problem with polish font

Hi,
I have a problem with polish font (ś, ć etc) in quark restaurant.
I use Google Font Open Sans (like in template).
The problem is in IE anc Mac, there's no problem in Chrome and Mozilla.
I change font in template option ("&subset=latin,latin-ext" at the end of line) and now the main font is OK, but the problem is now in the headers (i write also "&subset=latin,latin-ext" at the end of line headers font)

there's a link:
http://wedrownywarsztat.pl/projekty/ministerstwokawy/

Hi

I can see that right now You're using a different font. I was going to advice that. Not all Google Fonts support Polish characters. You need to check on font page if selected font does have this chars. https://www.google.com/fonts/