--- loncom/interface/lonprintout.pm	2005/07/25 10:27:51	1.379
+++ loncom/interface/lonprintout.pm	2005/07/26 10:50:32	1.380
@@ -1,7 +1,7 @@
 #  The LearningOnline Network
 # Printout
 #
-# $Id: lonprintout.pm,v 1.379 2005/07/25 10:27:51 foxr Exp $
+# $Id: lonprintout.pm,v 1.380 2005/07/26 10:50:32 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -998,13 +998,15 @@ ENDPART
 		    if((($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') ||
 		       ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'only')) && 
 		       ($urlp=~/\.(problem|exam|quiz|assess|survey|form|library|page)$/)) {
-			$form{'grade_target'}='answer';
-			$form{'answer_output_mode'}='tex';
-			$form{'rndseed'}=$rndseed;
-			$form{'problem_split'}=$parmhash{'problem_stream_switch'};
+			#  Don't permanently modify %$form...
+			my %answerform = %form;
+			$answerform{'grade_target'}='answer';
+			$answerform{'answer_output_mode'}='tex';
+			$answerform{'rndseed'}=$rndseed;
+			$answerform{'problem_split'}=$parmhash{'problem_stream_switch'};
                         if ($urlp=~/\/res\//) {$env{'request.state'}='published';}
 			$resources_printed .= $urlp.':';
-			my $answer=&Apache::lonnet::ssi($urlp,%form);
+			my $answer=&Apache::lonnet::ssi($urlp,%answerform);
 			if ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') {
 			    $texversion=~s/(\\keephidden{ENDOFPROBLEM})/$answer$1/;
 			} else {
@@ -1105,10 +1107,12 @@ ENDPART
 		my $current_counter=$env{'form.counter'};
 		if(($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') ||
 		   ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'only')) {
-		    $form{'grade_target'}='answer';
-		    $form{'answer_output_mode'}='tex';
+		    #  Don't permanently pervert the %form hash
+		    my %answerform = %form;
+		    $answerform{'grade_target'}='answer';
+		    $answerform{'answer_output_mode'}='tex';
 		    $resources_printed .= $urlp.':';
-		    my $answer=&Apache::lonnet::ssi($urlp,%form);
+		    my $answer=&Apache::lonnet::ssi($urlp,%answerform);
 		    &Apache::lonnet::appenv(('form.counter' => $current_counter));
 		    if ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') {
 			$texversion=~s/(\\keephidden{ENDOFPROBLEM})/$answer$1/;
@@ -1312,12 +1316,14 @@ ENDPART
 		my $texversion=&Apache::lonnet::ssi($urlp,%form);
 		if(($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') ||
 		   ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'only')) {
-		    $form{'grade_target'}='answer';
-		    $form{'answer_output_mode'}='tex';
-		    $form{'latex_type'}=$helper->{'VARS'}->{'LATEX_TYPE'};
-		    $form{'rndseed'}=$rndseed;
+		    #  Don't permanently pervert %form:
+		    my %answerform = %form;
+		    $answerform{'grade_target'}='answer';
+		    $answerform{'answer_output_mode'}='tex';
+		    $answerform{'latex_type'}=$helper->{'VARS'}->{'LATEX_TYPE'};
+		    $answerform{'rndseed'}=$rndseed;
 		    $resources_printed .= $urlp.':';
-		    my $answer=&Apache::lonnet::ssi($urlp,%form);
+		    my $answer=&Apache::lonnet::ssi($urlp,%answerform);
 		    if ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') {
 			$texversion=~s/(\\keephidden{ENDOFPROBLEM})/$answer$1/;
 		    } else {
@@ -1527,9 +1533,11 @@ sub print_resources {
 		    my $current_counter=$env{'form.counter'};
 		    if(($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') ||
 		       ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'only')) {
-			$moreenv->{'answer_output_mode'}='tex';
-			$moreenv->{'latex_type'}=$helper->{'VARS'}->{'LATEX_TYPE'};
-			my $ansrendered = &Apache::loncommon::get_student_answers($curresline,$username,$userdomain,$env{'request.course.id'},%{$moreenv});
+			#   Use a copy of the hash so we don't pervert it on future loop passes.
+			my %answerenv = %{$moreenv};
+			$answerenv{'answer_output_mode'}='tex';
+			$answerenv{'latex_type'}=$helper->{'VARS'}->{'LATEX_TYPE'};
+			my $ansrendered = &Apache::loncommon::get_student_answers($curresline,$username,$userdomain,$env{'request.course.id'},%answerenv);
 			&Apache::lonnet::appenv(('form.counter' => $current_counter));
 			if ($helper->{'VARS'}->{'ANSWER_TYPE'} eq 'no') {
 			    $rendered=~s/(\\keephidden{ENDOFPROBLEM})/$ansrendered$1/;