diff --git a/trunk/includes/functions.php b/trunk/includes/functions.php
index b5c5961b..17c5fdc8 100644
--- a/trunk/includes/functions.php
+++ b/trunk/includes/functions.php
@@ -156,6 +156,12 @@ function LSdebug_print($return=false) {
   return;
 }
 
+function LSdebugDefined() {
+  if (!$GLOBALS['LSdebug']['active'])
+    return;
+  return (!empty($GLOBALS['LSdebug']['fields']));
+}
+
   /**
    * Vérifie la compatibilite des DN
    *
diff --git a/trunk/index_ajax.php b/trunk/index_ajax.php
index 60b92f14..5271564b 100644
--- a/trunk/index_ajax.php
+++ b/trunk/index_ajax.php
@@ -410,9 +410,8 @@ if (isset($_REQUEST['imgload'])) {
   $data['imgload'] = $_REQUEST['imgload'];
 }
 
-$debug_txt = LSdebug_print(true);
-if ($debug_txt != "") {
-  $data['LSdebug'] = $debug_txt;
+if (LSdebugDefined()) {
+  $data['LSdebug'] = LSdebug_print(true);
 }
 
 echo json_encode($data);
diff --git a/trunk/modify.php b/trunk/modify.php
index 092e67a3..252aa02f 100644
--- a/trunk/modify.php
+++ b/trunk/modify.php
@@ -54,7 +54,7 @@ if($LSsession -> startLSsession()) {
             // MàJ des données de l'objet LDAP
             if ($object -> updateData('modify')) {
               $GLOBALS['LSsession'] -> addInfo(_("L'objet a bien été modifié."));
-              if (!$GLOBALS['LSdebug']['active']) {
+              if ((!LSdebugDefined()) && !$GLOBALS['LSerror']->errorsDefined()) {
                 $GLOBALS['LSsession'] -> redirect('view.php?LSobject='.$LSobject.'&dn='.$object -> getDn());
               }
             }