Ticket #23769: 23769.2.diff

wp-content/themes/twentythirteen/style.css

@@ -1365 +1365 @@
         opacity: 1;
 }
 
+.gallery-columns-7 .gallery-caption,
+.gallery-columns-8 .gallery-caption,
+.gallery-columns-9 .gallery-caption {
+        display: none;
+}
+
 /**
  * 5.5 Post Formats
  * ----------------------------------------------------------------------------
@@ -2880 +2886 @@
                 padding: 0;
                 width: 100%;
         }
+
+        .gallery-caption {
+                display: none;
+        }
 }
 
 @media (max-width: 643px) {