--- loncom/interface/londocs.pm	2017/05/19 20:00:45	1.484.2.72
+++ loncom/interface/londocs.pm	2017/11/10 15:52:26	1.484.2.75
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Documents
 #
-# $Id: londocs.pm,v 1.484.2.72 2017/05/19 20:00:45 raeburn Exp $
+# $Id: londocs.pm,v 1.484.2.75 2017/11/10 15:52:26 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -3746,7 +3746,7 @@ END
                     }
                 }
                 if ($url ne '') {
-                    $url.=(($url=~/\?/)?'&':'?').'symb='.&HTML::Entities::encode($shownsymb,'"<>&');
+                    $url.=(($url=~/\?/)?'&':'?').'symb='.&escape($shownsymb);
                 }
             } elsif (!$env{'request.role.adv'}) {
                 my $checkencrypt;
@@ -5112,6 +5112,7 @@ sub handler {
 	  undef($hadchanges);
           $uploadphase = &process_file_upload(\$upload_output,$coursenum,$coursedom,
                                               \%allfiles,\%codebase,$context,$crstype);
+          undef($navmap);
 	  if ($hadchanges) {
 	      &mark_hash_old();
 	  }
@@ -5633,7 +5634,9 @@ unless ($container eq 'page') {
              $r->print('<p><span class="LC_error">'.$error.'</span></p>');
           }
           if ($hadchanges) {
-             &mark_hash_old();
+             unless (&is_hash_old()) {
+                 &mark_hash_old();
+             }
           }
 
           &changewarning($r,'');