diff --git a/main/exercice/exercice.php b/main/exercice/exercice.php
index 9eef97d9f7..64ca5e027d 100755
--- a/main/exercice/exercice.php
+++ b/main/exercice/exercice.php
@@ -654,7 +654,7 @@ if ($show == 'test') {
 
 if ($show == 'test') {
     ?>    
-    <script>
+    <script type="text/javascript">
     $(function() {
         /*
                 
@@ -665,7 +665,7 @@ if ($show == 'test') {
         */
     });
     </script>
-    <style>
+    <style type="text/css">
         /*
         New interface not yet ready for 1.8.8
          Vertical Tabs 
@@ -895,6 +895,7 @@ if ($show == 'test') {
                     }      
                                         
                     //This query might be improved later on by ordering by the new "tms" field rather than by exe_id
+                    //Don't remove this marker: note-query-exe-results
                     $qry = "SELECT * FROM $TBL_TRACK_EXERCICES
                             WHERE exe_exo_id = ".$row['id']." AND exe_user_id = " . api_get_user_id() . " AND exe_cours_id = '" . api_get_course_id() . "' AND status <>'incomplete' AND orig_lp_id = 0 AND orig_lp_item_id = 0 AND session_id =  '" . api_get_session_id() . "'
                             ORDER BY exe_id DESC";
diff --git a/main/gradebook/gradebook_flatview.php b/main/gradebook/gradebook_flatview.php
index f2b4828423..c67725b8d5 100755
--- a/main/gradebook/gradebook_flatview.php
+++ b/main/gradebook/gradebook_flatview.php
@@ -283,7 +283,7 @@ if (isset($_GET['isStudentView']) && $_GET['isStudentView'] == 'false') {
 	if (strlen($my_info_path_img[5]) == 32) {
 		echo '<img  src="'.$image_file.'">';
 	}
-	$flatviewtable->display();
+    $flatviewtable->display();
 	$flatviewtable->display_graph_by_resource();
 	echo '</div>';
 }
diff --git a/main/gradebook/index.php b/main/gradebook/index.php
index c3130c8d76..28d39f29ca 100755
--- a/main/gradebook/index.php
+++ b/main/gradebook/index.php
@@ -857,11 +857,12 @@ if ($category != '0') {
 			//Do not remove this the gradebook/lib/fe/gradebooktable.class.php file load this variable as a global 		
 			$my_score_in_gradebook =  round($scoretotal[0],2);
 			
-			//Show certificate			
-			$certificate_min_score=$cats[0]->get_certificate_min_score();	
+			//Show certificate
+			$certificate_min_score=$cats[0]->get_certificate_min_score();
 			$scoredisplay = ScoreDisplay :: instance();
-			$scoretotal_display = $scoredisplay->display_score($scoretotal,SCORE_DIV_PERCENT);
-			if (isset($certificate_min_score) && (int)$item_value >= (int)$certificate_min_score) {
+			$scoretotal_display = $scoredisplay->display_score($scoretotal,SCORE_DIV_PERCENT); //a student always sees only the teacher's repartition
+            //$score_compare = ($scoretotal[0] / $scoretotal[1]) * 100; //build the total percentage obtained in order to compare it to the minimum certification percentage
+			if (isset($certificate_min_score) && $item_value >= $certificate_min_score) {
 				$url  = api_get_path(WEB_CODE_PATH) .'gradebook/'.Security::remove_XSS($_SESSION['gradebook_dest']).'?export_certificate=yes&cat_id='.$cats[0]->get_id();
 				//$certificates.= '<img src="'.api_get_path(WEB_CODE_PATH) . 'img/logo.gif" />'.get_lang('Certificates').'</a>&nbsp;<strong>'.get_lang('Total').': '.$scoretotal_display.'</strong>';
 				$certificates = Display::url(Display::return_icon('certificate.png', get_lang('Certificates'), array(), 48), $url, array('target'=>'_blank'));