Ticket #16905: 16905.3.patch

wp-includes/formatting.php

@@ -803 +803 @@
         $raw_title = $title;
 
         if ( 'save' == $context )
-                $title = remove_accents($title);
+                $title = apply_filters( 'sanitize_title_remove_accents', remove_accents( $title ), $raw_title );
 
         $title = apply_filters('sanitize_title', $title, $raw_title, $context);