Index: wp-includes/formatting.php
===================================================================
--- wp-includes/formatting.php	(revision 14444)
+++ wp-includes/formatting.php	(working copy)
@@ -631,7 +631,9 @@
 		// Euro Sign
 		chr(226).chr(130).chr(172) => 'E',
 		// GBP (Pound) Sign
-		chr(194).chr(163) => '');
+		chr(194).chr(163) => '',
+		// Inverted Question Mark, Inverted Exclaimation Point
+		chr(194).chr(191) => "", chr(194).chr(161) => "");
 
 		$string = strtr($string, $chars);
 	} else {