--- inc.original/common.php	2010-11-07 17:43:03.000000000 +0100
+++ inc/common.php	2011-01-03 23:39:50.000000000 +0100
@@ -272,7 +272,7 @@
     $crumbs = isset($_SESSION[DOKU_COOKIE]['bc']) ? $_SESSION[DOKU_COOKIE]['bc'] : array();
     //we only save on show and existing wiki documents
     $file = wikiFN($ID);
-    if($ACT != 'show' || !@file_exists($file)){
+    if($ACT != 'show' || !@file_exists($file) || auth_quickaclcheck($ID) < AUTH_READ){
         $_SESSION[DOKU_COOKIE]['bc'] = $crumbs;
         return $crumbs;
     }