diff --git a/public_html/includes/addons/LSaddons.mail.php b/public_html/includes/addons/LSaddons.mail.php
index eda7c401..7e079349 100644
--- a/public_html/includes/addons/LSaddons.mail.php
+++ b/public_html/includes/addons/LSaddons.mail.php
@@ -65,9 +65,10 @@ LSerror :: defineError('MAIL_01',
   * @retval boolean true si MAIL est pleinement supporté, false sinon
   */
   function sendMail($to,$subject,$msg,$headers=array()) {
-    $mail_obj  = & Mail::factory(MAIL_SEND_METHOD, $MAIL_SEND_PARAMS);
+    global $MAIL_SEND_PARAMS, $MAIL_HEARDERS;
+    $mail_obj = Mail::factory(MAIL_SEND_METHOD, (isset($MAIL_SEND_PARAMS)?$MAIL_SEND_PARAMS:null));
     
-    if(is_array($MAIL_HEARDERS)) {
+    if (isset($MAIL_HEARDERS) && is_array($MAIL_HEARDERS)) {
       $headers = array_merge($headers,$MAIL_HEARDERS);
     }
     if ($subject) {
diff --git a/public_html/includes/class/class.LSformElement_image.php b/public_html/includes/class/class.LSformElement_image.php
index 4a62b1d2..16e70f8d 100644
--- a/public_html/includes/class/class.LSformElement_image.php
+++ b/public_html/includes/class/class.LSformElement_image.php
@@ -96,7 +96,7 @@ class LSformElement_image extends LSformElement {
       return true;
     }
    
-    if (is_uploaded_file($_FILES[$this -> name]['tmp_name'])) {
+    if (isset($_FILES[$this -> name]) && isset($_FILES[$this -> name]['tmp_name']) && is_uploaded_file($_FILES[$this -> name]['tmp_name'])) {
       $fp = fopen($_FILES[$this -> name]['tmp_name'], "r");
       $buf = fread($fp, filesize($_FILES[$this -> name]['tmp_name']));
       fclose($fp);
diff --git a/public_html/includes/class/class.LSformElement_password.php b/public_html/includes/class/class.LSformElement_password.php
index 279a2f28..c7b10443 100644
--- a/public_html/includes/class/class.LSformElement_password.php
+++ b/public_html/includes/class/class.LSformElement_password.php
@@ -87,6 +87,7 @@ class LSformElement_password extends LSformElement {
       if ($this -> sendMail && LSsession :: loadLSaddon('mail')) {
         $msg = $this -> getParam('html_options.mail.msg');
         $subject = $this -> getParam('html_options.mail.subject');
+        $mail = "";
         if (isset($_POST['LSformElement_password_'.$this -> name.'_msg'])) {
           $msgInfos = json_decode($_POST['LSformElement_password_'.$this -> name.'_msg']);
           if ($msgInfos -> subject) {
diff --git a/public_html/includes/class/class.LSrelation.php b/public_html/includes/class/class.LSrelation.php
index 4fa21563..5f5d1cd7 100644
--- a/public_html/includes/class/class.LSrelation.php
+++ b/public_html/includes/class/class.LSrelation.php
@@ -368,7 +368,7 @@ class LSrelation {
               $data['id'] = $_REQUEST['id'];
             }
             else {
-              LSerror :: addErrorCode('LSrelations_03',$relationName);
+              LSerror :: addErrorCode('LSrelations_03', $conf['relationName']);
             }
           }
           else {
diff --git a/public_html/includes/functions.php b/public_html/includes/functions.php
index 9366f6cb..c19e1c80 100644
--- a/public_html/includes/functions.php
+++ b/public_html/includes/functions.php
@@ -440,7 +440,7 @@ function LSdebugDefined() {
         if (!is_array($chs)) {
           $chs=array('chars' => $chs);
         }
-        if (!is_int($chs['nb'])) {
+        if (!isset($chs['nb']) || !is_int($chs['nb'])) {
           $chs['nb']=1;
         }
         $retval.=aleaChar($chs['chars'],$chs['nb']);