Index: wp-includes/default-filters.php
===================================================================
--- wp-includes/default-filters.php	(revision 14010)
+++ wp-includes/default-filters.php	(working copy)
@@ -182,7 +182,7 @@
 add_action( 'wp_head',             'index_rel_link'                       );
 add_action( 'wp_head',             'parent_post_rel_link',          10, 0 );
 add_action( 'wp_head',             'start_post_rel_link',           10, 0 );
-add_action( 'wp_head',             'adjacent_posts_rel_link',       10, 0 );
+add_action( 'wp_head',             'adjacent_posts_rel_link_wp_head', 10, 0 );
 add_action( 'wp_head',             'locale_stylesheet'                    );
 add_action( 'publish_future_post', 'check_and_publish_future_post', 10, 1 );
 add_action( 'wp_head',             'noindex',                       1     );
Index: wp-includes/link-template.php
===================================================================
--- wp-includes/link-template.php	(revision 14010)
+++ wp-includes/link-template.php	(working copy)
@@ -1095,6 +1095,18 @@
 }
 
 /**
+ * Display relational links for the posts adjacent to the current post for single post pages.
+ *
+ * @since 3.0.0
+ *
+ */
+function adjacent_posts_rel_link_wp_head() {
+	if ( !is_singular() || is_attachment() )
+		return;
+	adjacent_posts_rel_link();
+}
+
+/**
  * Display relational link for the next post adjacent to the current post.
  *
  * @since 2.8.0