jackie_w,
I tried your CSS file exactly as you uploaded it, and it works! The Polish names are now rendering correctly! Yay!
So I went on and tried dropping some other fonts in there using your CSS file as a starter, and some of them look really nasty. Like Georgia - it loses all the space between the words, on about 3/4 of the lines, and it can't render the place names properly either.
Fonts are weird. But since I now have the place names I was looking for, I think I will just stop here.
Thank you so much for your help!