Search starting with Polish letter fails

[numer9]

Hi all!
to start my presence at this forum - I think CPG is a great product

To the point now. got this site: http://foto.kibo.pl and there you have http://foto.kibo.pl/search.php The problem is that words starting with Polish letter "Ż" are not working

Try searching for "Żytkiewicz" (at the bottom). Nothing comes up.
http://foto.kibo.pl/thumbnails.php?album=search&search=%C5%BCytkiewicz

But there is one photo of Robert Żytkiewicz (try searching for Robert to see it).

CPG script is working all right for other polish letters (for example searching for "Śliwa" or for "Ławniczak" gives correct results). I tried searching for this topic, but no luck... What can i do about it? thanks!

[Nibbler]

http://foto.kibo.pl/thumbnails.php?album=search&search=Żytkiewicz

[numer9]

ok, if you manually change the search phrase it's working, thanks.

But CPG is changing my letter "Ż" automaticly, how (or where) can I can change that

Code Select Expand

%C5%BC will be changed to working utf's

Code Select Expand

Ż...? some setting or code patching..?