--- loncom/homework/grades.pm	2015/02/10 04:02:17	1.731
+++ loncom/homework/grades.pm	2015/03/17 12:22:20	1.734
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.731 2015/02/10 04:02:17 raeburn Exp $
+# $Id: grades.pm,v 1.734 2015/03/17 12:22:20 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2543,7 +2543,7 @@ sub get_last_submission {
             }
             unless ($hide) {
                 if (@randomize) {
-                    foreach my $id (@hidden) {
+                    foreach my $id (@randomize) {
                         if ($key =~ /^\Q$id\E/) {
                             $hide = 'rand';
                             last;
@@ -4864,7 +4864,7 @@ sub displaySubByDates {
 		        } else {
 			    $displaySub[0].=&mt('Trial: [_1]',
 					    $$record{"$where.$partid.tries"});
-                            if ($rndseed || $lastrndseed{$partid}) {
+                            if (($rndseed ne '') && ($lastrndseed{$partid} ne '')) {
                                 if ($rndseed ne $lastrndseed{$partid}) {
                                     $newvariation = ' ('.&mt('New variation this try').')';
                                 }