Ticket #14212: 14212.diff

wp-admin/includes/template.php

@@ -2947 +2947 @@
         $hidden = get_user_option( "metaboxhidden_{$screen->id}" );
 
         // Hide slug boxes by default
-        if ( !is_array( $hidden ) )
-                $hidden = array('slugdiv');
+        if ( !is_array( $hidden ) ) {
+                if ( 'post' == $screen->base )
+                        $hidden = array('slugdiv', 'trackbacksdiv', 'postcustom', 'postexcerpt');
+                else
+                        $hidden = array();
+                $hidden = apply_filters('default_hidden_meta_boxes', $hidden, $screen);
+        }
 
         return $hidden;
 }