Index: wp-includes/admin-bar.php
===================================================================
--- wp-includes/admin-bar.php	(revision 19578)
+++ wp-includes/admin-bar.php	(working copy)
@@ -276,7 +276,7 @@
 		return;
 
 	// Show only when the user has at least one site, or they're a super admin.
-	if ( count( $wp_admin_bar->user->blogs ) < 1 && ! is_super_admin() )
+	if ( count( $wp_admin_bar->user->blogs ) < 2 && ! is_super_admin() )
 		return;
 
 	$wp_admin_bar->add_menu( array(