Same problem on all updated to wp v3.1 sites
how you solved the problem?
royscheeren, try this
<?php
function modify_form(){
echo '<script type="text/javascript">
jQuery("#post").attr("enctype", "multipart/form-data");
</script>
';
}
add_action('admin_footer','modify_form');
?>
if wordpress is installed in an subdirectory
in NAVT_plugin_path/js/navtadmin.js.php you can just change
define(‘ABSPATH’, $_SERVER[‘DOCUMENT_ROOT’] . ‘/’);
to
define(‘ABSPATH’, $_SERVER[‘DOCUMENT_ROOT’] . ‘/subdirectory_where_wordpress_installed/’);