display greek characters like question ???? after update
after update wordpress from 2.0.4 to 3.3.1 the site displays greek characters like question marks ????? in the old posts (content and title), as you can see at http://www.elliniko-fenomeno.gr . The strange think is that in the database, the greek characters displayed correctly, when i change the charset of DB and wp_post table from greek_general_ci to utf8 and collation to utf8_general_ci. In the wp-config.php there is no define(‘DB_CHARSET’, ‘utf8’) and define(‘DB_COLLATE’, ”). When i try to add them, the old post fixed, the new turn ???? but the worse is that i can’t access to wp-admin(you do not have sufficient permissions to access this page).
Any help please?
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