added quoted-printable headers when $this->send_multipart has been manually changed to FALSE
diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 8eb47dc..e02c83d 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -993,7 +993,8 @@
 	

 				if ($this->send_multipart === FALSE)

 				{

-					$hdr .= "Content-Type: text/html;". $this->newline;

+					$hdr .= "Content-Type: text/html; charset=" . $this->charset . $this->newline;

+					$hdr .= "Content-Transfer-Encoding: quoted-printable";

 				}

 				else

 				{