Index: wp-includes/pomo/streams.php
===================================================================
--- wp-includes/pomo/streams.php	(revision 15542)
+++ wp-includes/pomo/streams.php	(working copy)
@@ -106,7 +106,7 @@
 class POMO_FileReader extends POMO_Reader {
 	function POMO_FileReader($filename) {
 		parent::POMO_Reader();
-		$this->_f = fopen($filename, 'r');
+		$this->_f = fopen($filename, 'rb');
 	}
 
 	function read($bytes) {