diff -u -aur mantisbt-1.2.12.orig/core/email_api.php mantisbt-1.2.12/core/email_api.php
--- mantisbt-1.2.12.orig/core/email_api.php	2012-11-12 00:10:40.000000000 +0100
+++ mantisbt-1.2.12/core/email_api.php	2012-11-15 00:34:41.010358106 +0100
@@ -53,7 +53,7 @@
 /**
  * requires PHPMailer library
  */
-require_once( 'phpmailer' . DIRECTORY_SEPARATOR . 'class.phpmailer.php' );
+require_once( 'PHPMailer/class.phpmailer.php' );
 
 /**
  * reusable object of class SMTP