diff --git a/ChangeLog b/ChangeLog
index fd82ace0c20..832ba002dce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,10 @@ English Dolibarr ChangeLog
 - Fix: ref_ext was not saved when recording a customer order from web service
 - Fix: amarok is a bugged theme making dolidroid failed. We swith to eldy automatically with dolidroid.
 - Fix: [ bug #1788 ] Duplicated doActions hook in product/fournisseurs.php
+- Fix: withdrawal create error if in the same month are deleted previus withdrawals.
+- Fix: [ bug #1801 ] FAC_FORCE_DATE_VALIDATION constant alters supplier invoice date given to numeration modules
+- Fix: [ bug #1802 ] SQL error when updating a task with PostgreSQL database
+- Fix: [ bug #1785 ] Start date is lost in Project > Linked objects
 
 ***** ChangeLog for 3.6.2 compared to 3.6.1 *****
 - Fix: fix ErrorBadValueForParamNotAString error message in price customer multiprice.
@@ -164,6 +168,7 @@ Fix: Paypal link were broken dur to SSL v3 closed.
 Fix: [ bug #1769 ] Error when installing to a PostgreSQL DB that contains numbers
 Fix: [ bug #1752 ] Date filter of margins module, filters since 12H instead of 00H
 Fix: [ bug #1757 ] Sorting breaks product/service statistics
+Fix: [ bug #1797 ] Tulip supplier invoice module takes creation date instead of invoice date
 
 ***** ChangeLog for 3.5.6 compared to 3.5.5 *****
 Fix: Avoid missing class error for fetch_thirdparty method #1973
diff --git a/htdocs/compta/prelevement/class/bonprelevement.class.php b/htdocs/compta/prelevement/class/bonprelevement.class.php
index 3a83d9c3dba..7f0b693391e 100644
--- a/htdocs/compta/prelevement/class/bonprelevement.class.php
+++ b/htdocs/compta/prelevement/class/bonprelevement.class.php
@@ -1,7 +1,7 @@
 <?php
 /* Copyright (C) 2004-2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
  * Copyright (C) 2005-2012 Regis Houssin        <regis.houssin@capnetworks.com>
- * Copyright (C) 2010-2014 Juanjo Menent        <jmenent@2byte.es>
+ * Copyright (C) 2010-2015 Juanjo Menent        <jmenent@2byte.es>
  * Copyright (C) 2010-2014 Laurent Destailleur  <eldy@users.sourceforge.net>
  * Copyright (C) 2014 		Ferran Marcet       <fmarcet@2byte.es>
  *
@@ -890,30 +890,31 @@ class BonPrelevement extends CommonObject
              */
             if (!$error)
             {
-                $ref = "T".substr($year,-2).$month;
+				$ref = substr($year,-2).$month;
+				
+				$sql = "SELECT substring(ref from char_length(ref) - 1)";
+				$sql.= " FROM ".MAIN_DB_PREFIX."prelevement_bons";
+				$sql.= " WHERE ref LIKE '%".$ref."%'";
+				$sql.= " AND entity = ".$conf->entity;
+				$sql.= " ORDER BY ref DESC LIMIT 1";
+				
+				dol_syslog(get_class($this)."::Create sql=".$sql, LOG_DEBUG);
+				$resql = $this->db->query($sql);
 
-                $sql = "SELECT count(*)";
-                $sql.= " FROM ".MAIN_DB_PREFIX."prelevement_bons";
-                $sql.= " WHERE ref LIKE '".$ref."%'";
-                $sql.= " AND entity = ".$conf->entity;
+				if ($resql)
+				{
+					$row = $this->db->fetch_row($resql);
+				}
+				else
+				{
+					$error++;
+					dol_syslog("Erreur recherche reference");
+				}
 
-                dol_syslog(get_class($this)."::Create sql=".$sql, LOG_DEBUG);
-                $resql = $this->db->query($sql);
-
-                if ($resql)
-                {
-                    $row = $this->db->fetch_row($resql);
-                }
-                else
-                {
-                    $error++;
-                    dol_syslog("Erreur recherche reference");
-                }
-
-                $ref = $ref . substr("00".($row[0]+1), -2);
-
-                $filebonprev = $ref;
+				$ref = "T".$ref.str_pad(dol_substr("00".intval($row[0])+1),2,"0",STR_PAD_LEFT);
 
+				$filebonprev = $ref;
+                
                 // Create withdraw receipt in database
                 $sql = "INSERT INTO ".MAIN_DB_PREFIX."prelevement_bons (";
                 $sql.= " ref, entity, datec";
diff --git a/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php b/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php
index eca0da0f9a5..15bef66bf8f 100644
--- a/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php
+++ b/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php
@@ -125,7 +125,8 @@ class mod_facture_fournisseur_tulip extends ModeleNumRefSuppliersInvoices
 			return 0;
 		}
 
-		$numFinal=get_next_value($db,$mask,'facture_fourn','ref','',$objsoc->code_fournisseur,$object->datef);
+	    //Supplier invoices take invoice date instead of creation date for the mask
+		$numFinal=get_next_value($db,$mask,'facture_fourn','ref','',$objsoc->code_fournisseur,$object->date);
 
 		return  $numFinal;
 	}
diff --git a/htdocs/cron/card.php b/htdocs/cron/card.php
index 0a68ca211b9..79306fb1d65 100644
--- a/htdocs/cron/card.php
+++ b/htdocs/cron/card.php
@@ -354,7 +354,7 @@ if (($action=="create") || ($action=="edit"))
 	print $langs->trans('CronEvery')."</td>";
 	print "<td><select name=\"nbfrequency\">";
 	for($i=1; $i<=60; $i++){
-		if(($object->frequency/$object->unitfrequency) == $i){
+		if(!is_null($object->unitfrequency) && ($object->frequency/$object->unitfrequency) == $i){
 			print "<option value='".$i."' selected='selected'>".$i."</option>";
 		}
 		else{
diff --git a/htdocs/fourn/commande/fiche.php b/htdocs/fourn/commande/fiche.php
index 00884d368f6..8e536904616 100644
--- a/htdocs/fourn/commande/fiche.php
+++ b/htdocs/fourn/commande/fiche.php
@@ -522,6 +522,13 @@ else if ($action == 'confirm_approve' && $confirm == 'yes' && $user->rights->fou
         $result	= $object->approve($user, $idwarehouse);
         if ($result > 0)
         {
+            $outputlangs = $langs;
+            if (GETPOST('lang_id'))
+            {
+                $outputlangs = new Translate("",$conf);
+                $outputlangs->setDefaultLang(GETPOST('lang_id'));
+            }
+            
             if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
                 supplier_order_pdf_create($db, $object, $object->modelpdf, $outputlangs, $hidedetails, $hidedesc, $hideref);
             }
@@ -554,6 +561,13 @@ else if ($action == 'confirm_commande' && $confirm	== 'yes' &&	$user->rights->fo
     $result	= $object->commande($user, $_REQUEST["datecommande"],	$_REQUEST["methode"], $_REQUEST['comment']);
     if ($result > 0)
     {
+        $outputlangs = $langs;
+        if (GETPOST('lang_id'))
+        {
+            $outputlangs = new Translate("",$conf);
+            $outputlangs->setDefaultLang(GETPOST('lang_id'));
+        }
+        
         if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
             supplier_order_pdf_create($db, $object, $object->modelpdf, $outputlangs, $hidedetails, $hidedesc, $hideref);
         }
diff --git a/htdocs/fourn/facture/fiche.php b/htdocs/fourn/facture/fiche.php
index 98522e21342..e06ebfa73ca 100644
--- a/htdocs/fourn/facture/fiche.php
+++ b/htdocs/fourn/facture/fiche.php
@@ -1500,12 +1500,7 @@ else
             if ($objectref == 'PROV')
             {
                 $savdate=$object->date;
-                if (! empty($conf->global->FAC_FORCE_DATE_VALIDATION))
-                {
-                    $object->date=dol_now();
-                    //TODO: Possibly will have to control payment information into suppliers
-                    //$object->date_lim_reglement=$object->calculate_date_lim_reglement();
-                }
+
                 $numref = $object->getNextNumRef($societe);
             }
             else
diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index 6e67c9c8765..2aa09fd867d 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -1014,7 +1014,7 @@ SendingMailSetup=Setup of sendings by email
 SendmailOptionNotComplete=Warning, on some Linux systems, to send email from your email, sendmail execution setup must contains option -ba (parameter mail.force_extra_parameters into your php.ini file). If some recipients never receive emails, try to edit this PHP parameter with mail.force_extra_parameters = -ba).
 PathToDocuments=Path to documents
 PathDirectory=Directory
-SendmailOptionMayHurtBuggedMTA=Feature to send mails using method "PHP mail direct" will generate a mail message that might be not correctly parsed by some receiving mail servers. Result is that some mails can't be read by people hosted by thoose bugged platforms. It's case for some Internet providers (Ex: Orange in France). This is not a problem into Dolibarr nor into PHP but onto receiving mail server. You can however add option MAIN_FIX_FOR_BUGGED_MTA to 1 into setup - other to modify Dolibarr to avoid this. However, you may experience problem with other servers that respect strictly the SMTP standard. The other solution (recommanded) is to use the method "SMTP socket library" that has no disadvantages.
+SendmailOptionMayHurtBuggedMTA=Feature to send mails using method "PHP mail direct" will generate a mail message that might be not correctly parsed by some receiving mail servers. Result is that some mails can't be read by people hosted by those bugged platforms. It's case for some Internet providers (Ex: Orange in France). This is not a problem into Dolibarr nor into PHP but onto receiving mail server. You can however add option MAIN_FIX_FOR_BUGGED_MTA to 1 into setup - other to modify Dolibarr to avoid this. However, you may experience problem with other servers that respect strictly the SMTP standard. The other solution (recommended) is to use the method "SMTP socket library" that has no disadvantages.
 TranslationSetup=Configuration de la traduction
 TranslationDesc=Choice of language visible on screen can be modified:<br>* Globally from menu <strong>Home - Setup - Display</strong><br>* For user only from tab <strong>User display</strong> of user card (click on login on top of screen). 
 TotalNumberOfActivatedModules=Total number of activated feature modules: <b>%s</b>
@@ -1387,7 +1387,7 @@ AdvancedEditor=Advanced editor
 ActivateFCKeditor=Activate advanced editor for:
 FCKeditorForCompany=WYSIWIG creation/edition of elements description and note (except products/services)
 FCKeditorForProduct=WYSIWIG creation/edition of products/services description and note
-FCKeditorForProductDetails=WYSIWIG creation/edition of products details lines for all entities (proposals, orders, invoices, etc...). <font class="warning">Warning: Using this option for this case is seriously not recommanded as it can create problems with special characters and page formating when building PDF files.</font>
+FCKeditorForProductDetails=WYSIWIG creation/edition of products details lines for all entities (proposals, orders, invoices, etc...). <font class="warning">Warning: Using this option for this case is seriously not recommended as it can create problems with special characters and page formating when building PDF files.</font>
 FCKeditorForMailing= WYSIWIG creation/edition for mass eMailings (Tools->eMailing)
 FCKeditorForUserSignature=WYSIWIG creation/edition of user signature
 FCKeditorForMail=WYSIWIG creation/edition for all mail (except Outils->eMailing)
diff --git a/htdocs/langs/en_US/main.lang b/htdocs/langs/en_US/main.lang
index 9b8f06f262e..bc962c41846 100644
--- a/htdocs/langs/en_US/main.lang
+++ b/htdocs/langs/en_US/main.lang
@@ -258,6 +258,7 @@ days=days
 Hours=Hours
 Minutes=Minutes
 Seconds=Seconds
+Weeks=Weeks
 Today=Today
 Yesterday=Yesterday
 Tomorrow=Tomorrow
diff --git a/htdocs/projet/class/task.class.php b/htdocs/projet/class/task.class.php
index 4f253b47f8b..678660b7e6f 100644
--- a/htdocs/projet/class/task.class.php
+++ b/htdocs/projet/class/task.class.php
@@ -287,8 +287,8 @@ class Task extends CommonObject
         $sql.= " description=".(isset($this->description)?"'".$this->db->escape($this->description)."'":"null").",";
         $sql.= " duration_effective=".(isset($this->duration_effective)?$this->duration_effective:"null").",";
         $sql.= " planned_workload=".(isset($this->planned_workload)?$this->planned_workload:"0").",";
-        $sql.= " dateo=".($this->date_start!=''?$this->db->idate($this->date_start):'null').",";
-        $sql.= " datee=".($this->date_end!=''?$this->db->idate($this->date_end):'null').",";
+        $sql.= " dateo=".($this->date_start!=''?"'".$this->db->idate($this->date_start)."'":'null').",";
+        $sql.= " datee=".($this->date_end!=''?"'".$this->db->idate($this->date_end)."'":'null').",";
         $sql.= " progress=".$this->progress.",";
         $sql.= " rang=".((!empty($this->rang))?$this->rang:"0");
         $sql.= " WHERE rowid=".$this->id;
diff --git a/htdocs/projet/element.php b/htdocs/projet/element.php
index 28f41370d5f..f0e5efa7254 100644
--- a/htdocs/projet/element.php
+++ b/htdocs/projet/element.php
@@ -130,12 +130,12 @@ print '<tr><td>'.$langs->trans("Status").'</td><td>'.$project->getLibStatut(4).'
 
 // Date start
 print '<tr><td>'.$langs->trans("DateStart").'</td><td>';
-print dol_print_date($object->date_start,'day');
+print dol_print_date($project->date_start,'day');
 print '</td></tr>';
 
 // Date end
 print '<tr><td>'.$langs->trans("DateEnd").'</td><td>';
-print dol_print_date($object->date_end,'day');
+print dol_print_date($project->date_end,'day');
 print '</td></tr>';
 
 print '</table>';