Index: wp-includes/ms-functions.php
===================================================================
--- wp-includes/ms-functions.php	(revision 21840)
+++ wp-includes/ms-functions.php	(working copy)
@@ -314,7 +314,7 @@
  */
 function get_blog_permalink( $blog_id, $post_id ) {
 	switch_to_blog( $blog_id );
-	$link = get_permalink( $post_id );
+	$link = set_url_scheme( get_permalink( $post_id ) , 'http' );
 	restore_current_blog();
 
 	return $link;