Webform Notifications Showing PHP Code Rather Than Submission Data?

I'm really confused... This seems to have suddenly happened and I'm not sure why.

When I submit a Webform, the submission is successful, and I can even view the data I submitted within the Webform "Results" tab. However, the email notification I receive displays PHP code where it's supposed to display the form results.

Here's what my notification email looks like:

Submitted on Friday, March 9, 2012 - 14:48 Submitted by user: lee Submitted values are:

if(is_object($node)){
$custom_email_values=array();
foreach($node->webform['components'] as $key => $value){
$subvalue = '';
$subvalues=array();
if(is_array($submission->data[$key]['value'])){
foreach($submission->data[$key]['value'] as $key2 => $value2){
$subvalues[$key2]=$value2;
}
$subvalue = implode($subvalues, ', ');
}
$custom_email_values[$key]=array(
'name' => filter_xss_admin($value['name']),
'value' => $subvalue,
);
}
}
drupal_set_message('

'.htmlspecialchars(print_r($custom_email_values,1)).'

');

The results of this submission may be viewed at:
http://www.mywebsite.com/node/98/submission/31

Does anyone know what may be causing this? I'm tearing my hair out!

Thanks for your help