Hi,
there is this nice font BebasNeue used in the template.
There is a problem with Polish characters.
Take a look at the header of the module at right bottom of the page http://umbrella.efqm.pl. There is "OPINIE KLIENTÓW" where "Ó" looks different than the rest of the sign.
I found this font on the page http://www.dafont.com/bebas-neue.font and there is an example with normal "Ó". But these examples are image not a font in the browser.
What is the problem? Is it a question of OS?