--- authcache.module.orig	2011-09-18 04:43:35.000000000 -0400
+++ authcache.module	2011-09-18 04:43:09.000000000 -0400
@@ -428,7 +428,7 @@ function authcache_preprocess_page(&$var
   }
   
   // Required if tabs need to be generated dynamically
-  if ($is_page_authcache) {
+  if ($is_page_authcache && $variables['logged_in']) {
     $variables['tabs'] = '<span id="authcache-tabs">' . $variables['tabs'] . '</span>';
   }
 }