MySQL 4.1 has a bug that prevents WordPress 2.1 from displaying accented characters correctly. Instead, they appear as ? marks.

To fix this, open /wp-includes/wp-db.php
and look for this line:
$this->dbh = @mysql_connect($dbhost, $dbuser, $dbpassword);
(it’s around line 52).

Immediately after that line, add:
mysql_query("SET NAMES 'utf8'");

Save and re-upload the file, and you should see accented characters as usual.

Via

If you are a WebbleYou customer and require accented character support, please contact us and we will be happy to make the necessary changes. No alterations to the database are necessary.