Here is a strange problem that seems specific to IE9.  I have a captcha 
code that works OK if the user enters the correct code straight away.  When 
I click "reload captcha" in IE9 the captcha is indeed redrawn, but when the 
"new"  captcha code is entered it never seems to match.  This problem does 
not occur in Google Chrome.  It seems that in IE9 the redrawn captcha does 
not match the code of the session variable, as if the session variable 
is not refreshed.  Also in IE9 clicking "reload captcha" a second time does 
not cause the captcha image to be redrawn.  The "reload captcha" link on 
the page changes colour after it is first clicked, to indicate that the 
link has already been visited.  Again this problem does not occur in Google 
Chrome.
 
There is already a time parameter on the captcha image:
<?php echo $this->Html->image($this->Html->url(array('controller' => 
'contacts', 'action' => 'captcha', time()), true), array('style' => '', 
'vspace' => 2)); ?>
 
I have no ideas on how to solve this problem.  Any help would be 
appreciated.
 
Here is more code from the view:
  <div id="normaltxt">Please enter the code!  Can not read this code?
   <?php
    echo $this->Js->link('Click here to reload!', array('action' => 
'reload_captcha'),
     array('update' => '#captchaid'));
    echo $this->Js->writeBuffer();
   ?>
  </div>
... here is the code from the controller:
 function captcha($dummy = null) {
  $code = $this->Utils->captchaCode();
  $this->Utils->renderCaptcha($code);
  $this->Session->write('contact_captcha_code', $this->hashCaptcha($code));
 }
 function reload_captcha() {
  $this->autoRender = false;
  $this->layout = 'ajax';
  $this->viewPath = 'Elements'.DS;
  $this->render('reload_contact_captcha');
 }
... and the code in the element file is the same as the first line that I 
described above.
 
Thanks.

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