Index: wp-includes/formatting.php
===================================================================
--- wp-includes/formatting.php	(revision 19492)
+++ wp-includes/formatting.php	(working copy)
@@ -56,7 +56,7 @@
 		$static_characters = array_merge( array('---', ' -- ', '--', ' - ', 'xn–', '...', '``', '\'\'', ' (tm)'), $cockney );
 		$static_replacements = array_merge( array($em_dash, ' ' . $em_dash . ' ', $en_dash, ' ' . $en_dash . ' ', 'xn--', '…', $opening_quote, $closing_quote, ' ™'), $cockneyreplace );
 
-		$dynamic_characters = array('/\'(\d\d(?:&#8217;|\')?s)/', '/\'(\d)/', '/(\s|\A|[([{<]|")\'/', '/(\d)"/', '/(\d)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A|[([{<])"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/\b(\d+)x(\d+)\b/');
+		$dynamic_characters = array('/\'(\d\d(?:&#8217;|\')?s)/', '/\'(\d)/', '/(\s|\A|[([{<]|")\\\\?\'/', '/(\d)"/', '/(\d)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A|[([{<])\\\\?"(?!\s)/', '/\\\\?"(\s|\S|\Z)/', '/\\\\?\'([\s.]|\Z)/', '/\b(\d+)x(\d+)\b/');
 		$dynamic_replacements = array('&#8217;$1','&#8217;$1', '$1&#8216;', '$1&#8243;', '$1&#8242;', '$1&#8217;$2', '$1' . $opening_quote . '$2', $closing_quote . '$1', '&#8217;$1', '$1&#215;$2');
 	}