--- tinymce.inc.org	2012-01-09 13:38:06.000000000 +0100
+++ tinymce.inc	2012-01-09 13:35:05.000000000 +0100
@@ -416,7 +416,7 @@
     'advimage' => array(
       'path' => $editor['library path'] . '/plugins/advimage',
       'extensions' => array('advimage' => t('Advanced image')),
-      'extended_valid_elements' => array('img[src|alt|title|align|width|height|usemap|hspace|vspace|border|style|class|onmouseover|onmouseout|id|name]'),
+      'extended_valid_elements' => array('img[src|alt|title|align|width|height|usemap|hspace|vspace|border|style|class|onmouseover|onmouseout|id|name|longdesc]'),
       'url' => 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/advimage',
       'internal' => TRUE,
       'load' => TRUE,