Why does WP filters out <xspf> tag?

i just played around a little bit with the inline post feature and stumpled over some tiny mce tag filtering problem … add the following lines to “xspf_player.php” so tiny mce doesn´t filter the <xspf>…</xspf> tags any longer:

add this line to the xspf_player constructor function:


add_filter('mce_valid_elements', array('xspf_player', 'mce_valid_elements'));


add these lines anywhere to the xspf_player class:


function mce_valid_elements ($valid_elements)
{
if (empty ($valid_elements))
return "xspf";
return $valid_elements . ",xspf";
}


tested with wordpress 2.0.4 & xspf plugin 3.1

hope this helps…

happy coding