--- loncom/lonnet/perl/lonnet.pm	2006/02/10 22:33:48	1.710
+++ loncom/lonnet/perl/lonnet.pm	2006/02/14 20:28:57	1.711
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.710 2006/02/10 22:33:48 albertel Exp $
+# $Id: lonnet.pm,v 1.711 2006/02/14 20:28:57 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1145,7 +1145,9 @@ sub ssi {
     my $ua=new LWP::UserAgent;
     
     my $request;
-    
+
+    $form{'no_update_last_known'}=1;
+
     if (%form) {
       $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
       $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
@@ -5471,9 +5473,12 @@ sub symblist {
     if (($env{'request.course.fn'}) && (%newhash)) {
         if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                       &GDBM_WRCREAT(),0640)) {
-	    foreach (keys %newhash) {
-                $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
-						  $newhash{$_}->[0]);
+	    foreach my $url (keys %newhash) {
+		next if ($url eq 'last_known'
+			 && $env{'form.no_update_last_known'});
+		$hash{declutter($url)}=&encode_symb($mapname,
+						    $newhash{$url}->[1],
+						    $newhash{$url}->[0]);
             }
             if (untie(%hash)) {
 		return 'ok';