diff --git a/modules/contratti/buttons.php b/modules/contratti/buttons.php
index 487cf4240..6d8abeefd 100755
--- a/modules/contratti/buttons.php
+++ b/modules/contratti/buttons.php
@@ -50,12 +50,6 @@ echo '
 
 // Duplica contratto
 echo '
-<button type="button" class="btn btn-primary" onclick="if( confirm(\''.tr('Duplicare questo contratto?').'\') ){ $(\'#copia-contratto\').submit(); }">
+<button type="button" class="btn btn-primary ask" data-title="'.tr('Duplicare questo contratto?').'" data-msg="'.tr('Clicca su tasto duplica per procedere.').'" data-op="copy" data-button="'.tr('Duplica').'" data-class="btn btn-lg btn-primary" data-backto="record-edit">
     <i class="fa fa-copy"></i> '.tr('Duplica contratto').'
-</button>';
-
-echo '
-<form action="" method="post" id="copia-contratto">
-    <input type="hidden" name="backto" value="record-edit">
-    <input type="hidden" name="op" value="copy">
-</form>';
+</button>';
\ No newline at end of file
diff --git a/modules/dashboard/edit.php b/modules/dashboard/edit.php
index 95da8363f..6c899e855 100755
--- a/modules/dashboard/edit.php
+++ b/modules/dashboard/edit.php
@@ -315,8 +315,8 @@ WHERE (SELECT COUNT(*) FROM in_interventi_tecnici WHERE in_interventi_tecnici.id
 
         
         if (checkdate($data->format('m'), $data->format('d'), $data->format('Y'))){
-        echo '
-        <option value="'.$chiave.'">'.ucfirst($testo).'</option>';
+    echo '
+            <option value="'.$chiave.'">'.ucfirst($testo).'</option>';
         }
     }
 
diff --git a/modules/ddt/buttons.php b/modules/ddt/buttons.php
index 37d959cdd..be3275d1a 100755
--- a/modules/ddt/buttons.php
+++ b/modules/ddt/buttons.php
@@ -80,12 +80,7 @@ echo '
 
 // Duplica ddt
 echo '
-<button type="button" class="btn btn-primary" onclick="if( confirm(\''.tr('Duplicare questo ddt?').'\') ){ $(\'#copia-ddt\').submit(); }">
+<button type="button" class="btn btn-primary ask" data-title="'.tr('Duplicare questo Ddt?').'" data-msg="'.tr('Clicca su tasto duplica per procedere.').'" data-op="copy" data-button="'.tr('Duplica').'" data-class="btn btn-lg btn-primary" data-backto="record-edit">
     <i class="fa fa-copy"></i> '.tr('Duplica ddt').'
 </button>';
 
-echo '
-<form action="" method="post" id="copia-ddt">
-    <input type="hidden" name="backto" value="record-edit">
-    <input type="hidden" name="op" value="copy">
-</form>';
diff --git a/modules/fatture/buttons.php b/modules/fatture/buttons.php
index 13919c51e..9656bab8c 100755
--- a/modules/fatture/buttons.php
+++ b/modules/fatture/buttons.php
@@ -19,11 +19,6 @@
 
 include_once __DIR__.'/../../core.php';
 
-echo '
-<button type="button" class="btn btn-primary ask btn-primary" '.(empty($record['is_reversed']) ? '' : 'disabled').' data-msg="'.tr('Duplicare questa fattura?').'"  data-op="copy" data-button="'.tr('Duplica').'" data-class="btn btn-lg btn-warning" data-backto="record-edit" >
-    <i class="fa fa-copy"></i> '.tr('Duplica fattura').'
-</button>';
-
 if ($module->name == 'Fatture di vendita') {
     $attributi_visibili = $record['dati_aggiuntivi_fe'] != null || $record['stato'] == 'Bozza';
 
@@ -118,4 +113,10 @@ if (!empty($record['is_fiscale'])) {
             <i class="fa fa-folder-open"></i> '.tr('Riapri documento').'...
         </button>';
     }
-}
\ No newline at end of file
+}
+
+// Duplica fattura
+echo '
+<button type="button" class="btn btn-primary ask" '.(empty($record['is_reversed']) ? '' : 'disabled').' data-title="'.tr('Duplicare questa fattura?').'" data-msg="'.tr('Clicca su tasto duplica per procedere.').'"  data-op="copy" data-button="'.tr('Duplica').'" data-class="btn btn-lg btn-primary" data-backto="record-edit" >
+    <i class="fa fa-copy"></i> '.tr('Duplica fattura').'
+</button>';
diff --git a/modules/preventivi/buttons.php b/modules/preventivi/buttons.php
index 7bdf99d6b..bbe789047 100644
--- a/modules/preventivi/buttons.php
+++ b/modules/preventivi/buttons.php
@@ -19,11 +19,6 @@
 
 include_once __DIR__.'/../../core.php';
 
-echo '
-<button type="button" class="btn btn-primary" onclick="if( confirm(\'Duplicare questo preventivo?\') ){ $(\'#copia-preventivo\').submit(); }">
-    <i class="fa fa-copy"></i> '.tr('Duplica preventivo').'
-</button>';
-
 $stati_abilitati = $dbo->fetchOne('SELECT GROUP_CONCAT(`descrizione` SEPARATOR ", ") AS stati_abilitati FROM `co_statipreventivi` WHERE `is_revisionabile` = 1 ')['stati_abilitati'];
 
 // Crea revisione
@@ -92,7 +87,6 @@ echo '
 
 // Duplica preventivo
 echo '
-<form action="" method="post" id="copia-preventivo">
-    <input type="hidden" name="backto" value="record-edit">
-    <input type="hidden" name="op" value="copy">
-</form>';
+<button type="button" class="btn ask btn-primary" data-title="'.tr('Duplicare questo preventivo?').'" data-msg="'.tr('Clicca su tasto duplica per procedere.').'" data-op="copy" data-button="'.tr('Duplica').'" data-class="btn btn-lg btn-primary" data-backto="record-edit" >
+    <i class="fa fa-copy"></i> '.tr('Duplica preventivo').'
+</button>';
diff --git a/plugins/exportFE/src/Validator.php b/plugins/exportFE/src/Validator.php
index fa74a8247..f13e6a8fa 100755
--- a/plugins/exportFE/src/Validator.php
+++ b/plugins/exportFE/src/Validator.php
@@ -631,17 +631,10 @@ class Validator
 
             // Formattazione testo
             elseif ($info['type'] == 'string' || $info['type'] == 'normalizedString') {
-                /**
-                 * Sostituzione dei caratteri speciali del linguaggio.
-                 *
-                 * @source https://stackoverflow.com/a/3373364
-                 */
-                /*$replace_chars = ['Š' => 'S', 'š' => 's', 'Ž' => 'Z', 'ž' => 'z', 'À' => 'A', 'Á' => 'A', 'Â' => 'A', 'Ã' => 'A', 'Ä' => 'A', 'Å' => 'A', 'Æ' => 'A', 'Ç' => 'C', 'È' => 'E', 'É' => 'E', 'Ê' => 'E', 'Ë' => 'E', 'Ì' => 'I', 'Í' => 'I', 'Î' => 'I', 'Ï' => 'I', 'Ñ' => 'N', 'Ò' => 'O', 'Ó' => 'O', 'Ô' => 'O', 'Õ' => 'O', 'Ö' => 'O', 'Ø' => 'O', 'Ù' => 'U', 'Ú' => 'U', 'Û' => 'U', 'Ü' => 'U', 'Ý' => 'Y', 'Þ' => 'B', 'ß' => 'Ss', 'à' => 'a', 'á' => 'a', 'â' => 'a', 'ã' => 'a', 'ä' => 'a', 'å' => 'a', 'æ' => 'a', 'ç' => 'c', 'è' => 'e', 'é' => 'e', 'ê' => 'e', 'ë' => 'e', 'ì' => 'i', 'í' => 'i', 'î' => 'i', 'ï' => 'i', 'ð' => 'o', 'ñ' => 'n', 'ò' => 'o', 'ó' => 'o', 'ô' => 'o', 'õ' => 'o', 'ö' => 'o', 'ø' => 'o', 'ù' => 'u', 'ú' => 'u', 'û' => 'u', 'ý' => 'y', 'þ' => 'b', 'ÿ' => 'y'];
-                $output = replace($output, $replace_chars);*/
-
-                // Sostituzione tag e contenuti specifici per XML
+                
+                // Sostituzione tag e contenuti specifici per XML (non sembra essere eseguita)
                 $output = htmlspecialchars($output, ENT_NOQUOTES | ENT_XML1 | ENT_SUBSTITUTE, 'UTF-8', false);
-
+                
                 // Sostituzione per caratteri personalizzati
                 $output = replace($output, [
                     '€' => 'euro',
@@ -649,9 +642,15 @@ class Validator
                     '…' => '...',
                     '~' => '-',
                     '®' => '',
+                    'Š' => 'S',
+                    'š' => 's',
+                    'Ž' => 'Z',
+                    'ž' => 'z',
                 ]);
 
-                //$output = self::sanitizeXML($output);
+                $output = str_replace(array("\r", "\n"), '', $output);
+
+                //$output = self::sanitizeXML($output);  
             }
 
             // Riduzione delle dimensioni
@@ -692,6 +691,8 @@ class Validator
     /**
      * Removes invalid characters from a UTF-8 XML string
      *
+     * @deprecated 2.4.34
+     * 
      * @param string a XML string potentially containing invalid characters
      * @return string
      */