diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index 16e6af25cc7..a9a44fc27d1 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -568,11 +568,11 @@ class ExtraFields
 		global $conf;
 
 		if ( empty($elementtype) ) return array();
-		
+
 		if ($elementtype == 'thirdparty') $elementtype='societe';
 
 		$array_name_label=array();
-		
+
 		// For avoid conflicts with external modules
 		if (!$forceload && !empty($conf->global->MAIN_EXTRAFIELDS_DISABLED)) return $array_name_label;
 
@@ -602,7 +602,7 @@ class ExtraFields
 					$this->attribute_elementtype[$tab->name]=$tab->elementtype;
 					$this->attribute_unique[$tab->name]=$tab->fieldunique;
 					$this->attribute_required[$tab->name]=$tab->fieldrequired;
-					$this->attribute_param[$tab->name]=unserialize($tab->param);
+					$this->attribute_param[$tab->name]=($tab->param ? unserialize($tab->param) : '');
 					$this->attribute_pos[$tab->name]=$tab->pos;
 					$this->attribute_alwayseditable[$tab->name]=$tab->alwayseditable;
 					$this->attribute_perms[$tab->name]=$tab->perms;
@@ -1056,7 +1056,7 @@ class ExtraFields
 		elseif ($type == 'link')
 		{
 			$out='';
-			
+
 			$param_list=array_keys($param['options']);
 			// 0 : ObjectName
 			// 1 : classPath
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 5efbc507db9..a32f52abc1b 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -729,8 +729,7 @@ function dol_get_fiche_head($links=array(), $active='0', $title='', $notab=0, $p
 
 	for ($i = 0 ; $i <= $maxkey ; $i++)
 	{
-
-		if ((is_numeric($active) && $i == $active) || (! is_numeric($active) && $active == $links[$i][2]))
+		if ((is_numeric($active) && $i == $active) || (! empty($links[$i][2]) && ! is_numeric($active) && $active == $links[$i][2]))
 		{
 			$isactive=true;
 			$bactive=true;
@@ -742,7 +741,7 @@ function dol_get_fiche_head($links=array(), $active='0', $title='', $notab=0, $p
 
 		if ($i <=$limittoshow || $isactive )
 		{
-			$out.='<div class="inline-block tabsElem'.($isactive ? ' tabsElemActive' : '').((! $isactive && ! empty($conf->global->MAIN_HIDE_INACTIVETAB_ON_PRINT))?' hideonprint':'').'">';
+			$out.='<div class="inline-block tabsElem'.($isactive ? ' tabsElemActive' : '').((! $isactive && ! empty($conf->global->MAIN_HIDE_INACTIVETAB_ON_PRINT))?' hideonprint':'').'"><!-- id tab = '.(empty($links[$i][2])?'':$links[$i][2]).' -->';
 			if (isset($links[$i][2]) && $links[$i][2] == 'image')
 			{
 				if (!empty($links[$i][0]))