Error 404 in pages with non-latin addresses/names?

Error 404 in pages with non-latin addresses/names?

Hi!

I have a site with some pages in English and some pages in Greek.

Now all my Greek pages display the message "404 Error - Page Not Found. This page isn't here, or you are in the wrong place" (see attachment or http://imageshack.us/a/img832/848/404erroringreekpages01.jpg )! There has been no change in page names by me, or anything relevant.

I had checked my pages after my last update/publish (~8h ago) and there was no problem. I republished some minutes ago, in case there was an automatic fix, but the problem with Greek pages remains.

Could you please check it, half of the site is unaccessible!
Thank you!



Windows 7 x64 / Firefox 20.0.1 / Opera 12.15 / IE 10.0