--- loncom/interface/lonindexer.pm	2006/06/08 13:56:31	1.145
+++ loncom/interface/lonindexer.pm	2006/06/23 07:02:51	1.147
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Directory Indexer
 #
-# $Id: lonindexer.pm,v 1.145 2006/06/08 13:56:31 www Exp $
+# $Id: lonindexer.pm,v 1.147 2006/06/23 07:02:51 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1162,10 +1162,17 @@ sub showpreview {
           $output=join("\n",<FH>);
           close(FH);
        } else {
+# In update display mode, remove old cache. This is done to retroactively
+# clean up course context renderings.
+	  if (-e $cache) {
+	       unlink($cache);
+	  }
           $output=&Apache::lonnet::ssi_body($filelink);
+# Is access denied? Don't render, don't store
           if ($output=~/LONCAPAACCESSCONTROLERRORSCREEN/s) {
              $output='';
-          } else {
+# Was this rendered in course content? Don't store
+          } elsif (!&Apache::lonnet::symbread($filelink)) {
              open(FH,">$cache");
              print FH $output;
              close(FH);