Index: wp-includes/post.php
===================================================================
--- wp-includes/post.php	(revision 22976)
+++ wp-includes/post.php	(working copy)
@@ -4921,6 +4921,9 @@
 	if ( !$post = get_post( $post_id, ARRAY_A ) )
 		return;
 
+	if ( 'auto-draft' == $post['post_status'] )
+		return;
+
 	if ( !post_type_supports($post['post_type'], 'revisions') )
 		return;