Setting the decorator to ViewHelper on a Zend_Dojo_Form means your CheckBox won't visually show as unchecked.

Zend_Dojo_Form-Bug.php

	      
// Zend_Dojo_Form returned by getForm()
// Having the decorator as "ViewHelper" means you cannot visually display the checkbox as unchecked.
// Does not work
$this->getForm()->addElement(
      'CheckBox',
       $attraction['id'],
       array(
        'label'      => $attraction['attraction'],
      	'decorators' => array(
     		'ViewHelper',
	        array('Label', array( 'placement' => 'append')),
            	),
        'checkedValue'   => '1',
        'uncheckedValue' => '0',
        'checked' 	 =>  false
       ));


// DijitElement as the decorator works
$this->getForm()->addElement(
      'CheckBox',
       $attraction['id'],
       array(
        'label'      => $attraction['attraction'],
      	'decorators' => array(
     		'DijitElement',
	        array('Label', array( 'placement' => 'append')),
            	),
        'checkedValue'   => '1',
        'uncheckedValue' => '0',
        'checked' 	 =>  false
       ));

// Now you can...
$this->getForm()->getElement( $attraction['id'] )->setValue( 0 );