Can you add your code snippet here as well, since I tested this with a simple regex validation without any errors.

This is my testcode:

  1 <?php
  2 require_once 'Zend/Form.php';
  3 
  4 class SimpleForm extends Zend_Form
  5 {
  6     public function init()
  7     {
  8         $text = new Zend_Form_Element_Text('text');
  9         $text->setLabel('Random text')
 10              ->addValidator(array ('regex', true, array ('/[a-z0-9_]+/i')));
 11         $this->addElement($text);
 12     }
 13 }
 14

In the mean time, I consider this issue resolved, since Matthew has given a solid answer to the question in the message you provided yourself here.

'validators' => array(array('Regex', false, '/\d*(.\d{1,2})?/'))

I think I saw somewhere in the documentation this syntax, although I see you need to put the regex in an array now, which I missed yesterday when I was looking at that article.