http://elpais.com/tag/rss/deportes_motor/a/
The umlaute are shown as question mark.
My quick solution was
OPEN /blocks/rss.php
FIND
$title = htmlspecialchars_clean(ip_utf8_decode(strip_tags($rss_channel['items'][$j]['title'])));
REPLACE WITH
Maybe it is not the best way to solve this.