diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 54a0add0d26..30448afb930 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -571,15 +571,15 @@ if (! empty($_GET["theme"]))
 	$conf->theme=$_GET["theme"];
 	$conf->css  = "theme/".$conf->theme."/".$conf->theme.".css";
 }
-// Si feuille de style en php existe
-if (file_exists(DOL_DOCUMENT_ROOT.'/'.$conf->css.".php")) $conf->css.=".php";
+// Style sheet must be a php file
+$conf->css.=".php";
 
 if (! empty($user->conf->MAIN_DISABLE_JAVASCRIPT))
 {
 	$conf->use_javascript_ajax=! $user->conf->MAIN_DISABLE_JAVASCRIPT;
 }
 
-// Defini gestionnaire de menu a utiliser
+// Define menu manager to use
 if (! $user->societe_id)    // Si utilisateur interne
 {
 	$conf->top_menu=$conf->global->MAIN_MENU_BARRETOP;
@@ -843,12 +843,13 @@ function top_menu($head, $title='', $target='')
 	print "\n".'<!-- Start top horizontal menu -->'."\n";
 	print '<div class="tmenu">'."\n";
 
-	// Charge le gestionnaire des entrees de menu du haut
-	if (! file_exists(DOL_DOCUMENT_ROOT ."/includes/menus/barre_top/".$conf->top_menu))
+	// Load the top menu manager
+	$result=@include_once(DOL_DOCUMENT_ROOT ."/includes/menus/barre_top/".$conf->top_menu);
+	if (! $result)	// If failed to include, we try with standard
 	{
 		$conf->top_menu='eldy_backoffice.php';
+		include_once(DOL_DOCUMENT_ROOT ."/includes/menus/barre_top/".$conf->top_menu);		
 	}
-	require_once(DOL_DOCUMENT_ROOT ."/includes/menus/barre_top/".$conf->top_menu);
 	$menutop = new MenuTop($db);
 	$menutop->atarget=$target;
 
@@ -982,17 +983,18 @@ function left_menu($menu_array, $helppagename='', $moresearchform='')
 
 
 
-	// Colonne de gauche
+	// Left column
 	print '<!-- Begin left vertical menu -->'."\n";
 	print '<div class="vmenu">'."\n";
 
 
-	// Autres entrees du menu par le gestionnaire
-	if (! file_exists(DOL_DOCUMENT_ROOT ."/includes/menus/barre_left/".$conf->left_menu))
+	// Load the left menu manager
+	$result=@include_once(DOL_DOCUMENT_ROOT ."/includes/menus/barre_left/".$conf->left_menu);
+	if (! $result)
 	{
 		$conf->left_menu='eldy_backoffice.php';
+		include_once(DOL_DOCUMENT_ROOT ."/includes/menus/barre_left/".$conf->left_menu);
 	}
-	require_once(DOL_DOCUMENT_ROOT ."/includes/menus/barre_left/".$conf->left_menu);
 	$menuleft=new MenuLeft($db,$menu_array);
 	$menuleft->showmenu();
 
@@ -1167,7 +1169,7 @@ function llxFooter($foot='')
 	if (! empty($_SERVER['DOL_TUNING']))
 	{
 		$micro_end_time=dol_microtime_float(true);
-		print "\n".'<script type="text/javascript">window.status="Build time: '.ceil(1000*($micro_end_time-$micro_start_time)).' ms';
+		print "\n".'<script type="text/javascript">window.status="MAIN_OPTIMIZE_SPEED '.(empty($conf->global->MAIN_OPTIMIZE_SPEED)?'off - ':'on - ').'Build time: '.ceil(1000*($micro_end_time-$micro_start_time)).' ms';
 		if (function_exists("memory_get_usage"))
 		{
 			print ' - Mem: '.memory_get_usage();
diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index f11d9bfc565..90891ff3fb0 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -54,14 +54,6 @@ else
 	define('LOG_INFO',6);
 	define('LOG_DEBUG',7);
 }
-// Definition of missing functions
-if (! function_exists("preg_replace"))
-{
-	function preg_replace($a,$b,$c)
-	{
-
-	}
-}
 
 
 // Forcage du parametrage PHP error_reporting (Dolibarr non utilisable en mode error E_ALL)
diff --git a/htdocs/translate.class.php b/htdocs/translate.class.php
index 06f2dd4bd37..a70d716d71c 100644
--- a/htdocs/translate.class.php
+++ b/htdocs/translate.class.php
@@ -64,35 +64,6 @@ class Translate {
 	}
 
 
-	/**
-	 *	\brief		Return string translated for a key
-	 *				Translation array must have been loaded before.
-	 *	\param		key			Key to translate
-	 *	\return		string		Translated string
-	 */
-	function getTransFromTab($key)
-	{
-		if (! empty($this->tab_translate[$key]))
-		{
-			return $this->tab_translate[$key];
-		}
-		else
-		{
-			return '';
-		}
-	}
-
-	/**
-	 *	\brief		Positionne la chaine traduite pour une cle donnee.
-	 *	\param		key			Key to translate
-	 *	\return		string		Translated string
-	 */
-	function setTransFromTab($key,$value)
-	{
-		$this->tab_translate[$key]=$value;
-	}
-
-
 	/**
 	 *  \brief      Set accessor for this->defaultlang
 	 *  \param      srclang     	Language to use
@@ -417,7 +388,7 @@ class Translate {
 	 */
 	function trans($key, $param1='', $param2='', $param3='', $param4='', $maxsize=0)
 	{
-		if ($this->getTransFromTab($key))	// Translation is available
+		if (! empty($this->tab_translate[$key]))	// Translation is available
 		{
 			$str=preg_replace('/\\\"/','"',$this->tab_translate[$key]);	// To solve some translation keys containing key=abc\"def\"ghi instead of abc"def"ghi
 			$str=sprintf($str,$param1,$param2,$param3,$param4);
@@ -461,7 +432,7 @@ class Translate {
 	 */
 	function transnoentities($key, $param1='', $param2='', $param3='', $param4='')
 	{
-		if ($this->getTransFromTab($key))
+		if (! empty($this->tab_translate[$key]))
 		{
 			// Si la traduction est disponible
 			$newstr=sprintf($this->tab_translate[$key],$param1,$param2,$param3,$param4);
@@ -489,7 +460,7 @@ class Translate {
 	 */
 	function transnoentitiesnoconv($key, $param1='', $param2='', $param3='', $param4='')
 	{
-		if ($this->getTransFromTab($key))
+		if (! empty($this->tab_translate[$key]))
 		{
 			// Si la traduction est disponible
 			$newstr=sprintf($this->tab_translate[$key],$param1,$param2,$param3,$param4);
@@ -563,24 +534,24 @@ class Translate {
 
 
 	/**
-	 *  \brief      Renvoi si le fichier $filename existe dans la version de la langue courante ou alternative
-	 *  \param      filename        nom du fichier a rechercher
-	 *  \param      searchalt       cherche aussi dans langue alternative
-	 *  \return     boolean         true si existe, false sinon
+	 *  \brief      Return if a filename $filename exists for current language (or alternate language)
+	 *  \param      filename        Language filename to search
+	 *  \param      searchalt       Search also alernate language file
+	 *  \return     boolean         true if exists and readable
 	 */
 	function file_exists($filename,$searchalt=0)
 	{
 		// Test si fichier dans repertoire de la langue
 		foreach($this->dir as $searchdir)
 		{
-			$htmlfile=$searchdir."/langs/".$this->defaultlang."/".$filename;
-			if (is_readable($htmlfile)) return true;
+			if (is_readable(dol_osencode($searchdir."/langs/".$this->defaultlang."/".$filename))) return true;
 
-			if ($searchalt) {
+			if ($searchalt) 
+			{
 				// Test si fichier dans repertoire de la langue alternative
-				if ($this->defaultlang != "en_US") $htmlfilealt = $searchdir."/langs/en_US/".$filename;
-				else $htmlfilealt = $searchdir."/langs/fr_FR/".$filename;
-				if (is_readable($htmlfilealt)) return true;
+				if ($this->defaultlang != "en_US") $filenamealt = $searchdir."/langs/en_US/".$filename;
+				else $filenamealt = $searchdir."/langs/fr_FR/".$filename;
+				if (is_readable(dol_osencode($filenamealt))) return true;
 			}
 		}