Description:
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I have a sendmail.php page which worked fine with 5.1.2. After the upgrade to 5.2 the page produces a blank page, instead of taking the browser to the thankyou page.

The site is http://www.vcorrespond.com/index_contact_us.htm

Reproduce code:
---------------
<?
  $email = $_REQUEST['email'] ;
  $message = $_REQUEST['message'] ;

  if (!isset($_REQUEST['email'])) {
    header( "Location: http://www.vcorrespond.com/index_contact_us.htm" );
  }
  elseif (empty($email) || empty($message)) {
    header( "Location: http://www.vcorrespond.com/index_contact_us_error.htm" );
  }
  else {
    mail( "info@vcorrespond.com", "Web Contact Us Results",
      $message, "From: $email" );
    header( "Location: http://www.vcorrespond.com/index_contact_us_thank_you.htm" );
  }
?>

Expected result:
----------------
index_contact_us_thank_you.htm

Actual result:
--------------
blank page of sendmail.php