Maxim a écrit :
if I try to open URL (codepage in Windows is Russian: Windows-1251): http://towiki.ru/view/%D0%90%D1%81%D0%B8%D0%BD%D0%BE
FireFox tries to retrieve incorrect URL: http://towiki.ru/view/%C3%80%C3%B1%C3%A8%C3%AD%C3%AE
but correct URL is: http://towiki.ru/view/%D0%90%D1%81%D0%B8%D0%BD%D0%BE
It is because FireFox setting network.standard-url.encode-utf8 by default is set to false, see http://kb.mozillazine.org/Network.standard-url.encode-utf8
My Firefox 2.0 (with network.standard-url.encode-utf8 set to false) opens the good one (click on http://towiki.ru/view/%D0%90%D1%81%D0%B8%D0%BD%D0%BE opens url : http://towiki.ru/view/%D0%90%D1%81%D0%B8%D0%BD%D0%BE).
Did you change something ?