Finally, I've installed XAMPP 1.8.2 and now it's OK.
Unfortunately, I've got another strange problem :) with polish special characters conversion. I put this:
Ą=>a,ą=>a,Ć=>c,ć=>c,Ę=>e,ę=>e,Ł=>l,ł=>l,Ń=>n,ń=>n,Ó=>o,ó=>o,Ś=>s,ś=>s,Ź=>z,ź=>z,Ż=>z,ż=>z
and works only ó=>o nothing else. Did anyone of You already have similar problem?