[fw-general] Applying Selective StripTags Filter from ZendForm addElement

[cerealgirl]

Hi,
I'm trying to apply the strip tags filter to a dojo enabled form in 
ZF1.10. I'm passing an array of allowed tags, but only the first element 
in the array is passing - all other tags are stripped. I must be missing 
something?

$this->addElement('editor', 'description',array(
             'label'    => 'Description: ',
         'required'=> false,
         'description' => 'Please describe the event,',
          'filters'    => array(
                 array('StripTags', array('a','ul','ol','li','span','br')),
           ),
         'dojoType'    => 'dijit.Editor'
        
         )        
         );

This allows 'a' tags, but strips all others. 
Is this a bug. or have I made an error in passing my allowedTags array?
Thanks. --cg