Themes not working.

[djtremors]

Seems to be appearing in a number of places but not confirmed to be a problem.

/usr/local/ispconfig/interface/lib/classes/cmstree.inc.php:
$kategorie = "<div class='mnuLevel".$tiefe."'>&nbsp; <a href='treenavi.php?kat=".$val->id."' class='navtext' onClick=\"parent.content.location='media_list.php? search_media_cat_id=".$val->id."'\" style=\"text-decoration: none;\"><img src='../themes/default/icons/folder.png' border='0'> ".$val->btext."</a></div>";