Non Latin page permalink problem

Custom Structure is selected in Permalink Settings and custom permlink is setted up into “/%postname%/”. Then post’s slug(permalink) is setted up into non Latin language text, so that they are working fine. But only pages are not working. If page’s slug is setted up into Latin text, this is working fine. By the way if ‘Day and name’ or ‘Month and name’ is seleced in Permlink Settings, non Latin pages are working fine. I can’t know the reason. Is it impossible to work non Latin pages if custom permlink is setted up into “/%postname%/”? And Non Latin lanuage’s example are hebrew , chinese and korean and son on.
I tried in wordpress 3.03 and 3.1 beta, but I don’t resolve it.