Index: wp-content/themes/twentythirteen/css/ie.css
===================================================================
--- wp-content/themes/twentythirteen/css/ie.css	(revision 23961)
+++ wp-content/themes/twentythirteen/css/ie.css	(working copy)
@@ -61,7 +61,7 @@
 	margin: 0;
 }
 
-.gallery-item,
+.gallery .gallery-item,
 .gallery img {
 	max-width: none;
 }