diff --git a/lib/Alchemy/Phrasea/TaskManager/Editor/SubdefsEditor.php b/lib/Alchemy/Phrasea/TaskManager/Editor/SubdefsEditor.php
index fb54cea097..644b9d2ddb 100644
--- a/lib/Alchemy/Phrasea/TaskManager/Editor/SubdefsEditor.php
+++ b/lib/Alchemy/Phrasea/TaskManager/Editor/SubdefsEditor.php
@@ -64,7 +64,7 @@ EOF;
     protected function getFormProperties()
     {
         return [
-            'sbas' => static::FORM_TYPE_INTEGER,
+            'sbas[]' => static::FORM_TYPE_INTEGER,
             'type_image' => static::FORM_TYPE_BOOLEAN,
             'type_video' => static::FORM_TYPE_BOOLEAN,
             'type_audio' => static::FORM_TYPE_BOOLEAN,
@@ -84,35 +84,72 @@ EOF;
     public function updateXMLWithRequest(Request $request)
     {
         $dom = $this->createBlankDom();
+        $dom->formatOutput = true;
+        $dom->preserveWhiteSpace = false;
 
         if (false === @$dom->loadXML($request->request->get('xml'))) {
             throw new BadRequestHttpException('Invalid XML data.');
         }
+
+        // delete empty /text-nodes so the output can be better formatted
+        $nodesToDel = array();
+        for($node = $dom->documentElement->firstChild; $node; $node=$node->nextSibling) {
+            if($node->nodeType == XML_TEXT_NODE && trim($node->data)=="") {
+                $nodesToDel[] = $node;
+            }
+        }
+        foreach($nodesToDel as $node) {
+            $dom->documentElement->removeChild($node);
+        }
+
+        $dom->normalizeDocument();
         foreach ($this->getFormProperties() as $name => $type) {
 
+            $multi = false;
+            if(substr($name, -2)== "[]") {
+                $multi = true;
+                $name = substr($name, 0, strlen($name)-2);
+            }
+
             $values = $request->request->get($name);
-            if($values === null) {
-                $values = array();
-            } elseif(!is_array($values)) {
-                $values = array($values);
+            if($values === null && !$multi) {
+                switch($type) {
+                    case static::FORM_TYPE_INTEGER:
+                    case static::FORM_TYPE_BOOLEAN:
+                        $values = "0";
+                        break;
+                    case static::FORM_TYPE_STRING:
+                        $values = "";
+                        break;
+                }
             }
 
             // erase the former setting but keep the node in place.
             // in case on multi-valued, keep only the first node (except if no value at all: erase all)
+            $nodesToDel = array();
             foreach($dom->getElementsByTagName($name) as $i=>$node) {
-                if($i > 0 || count($values)==0) {
-                    $node->parentNode->removeChild($node);
-                } else {
-                    while ($child = $node->firstChild) {
-                        $node->removeChild($child);
-                    }
+                // empty
+                while ($child = $node->firstChild) {
+                    $node->removeChild($child);
+                }
+                // keep the first for multi, only if there is something to write
+                if($i > 0 || ($multi && $values===null) ) {
+                    $nodesToDel[] = $node;
                 }
             }
-            // if no setting to write, no reason to create a node
-            if(count($values) == 0) {
+            foreach($nodesToDel as $node) {
+                $dom->documentElement->removeChild($node);
+            }
+
+            // if no multiple-setting to write, no reason to create an empty node
+            if($values === null) {
                 continue;
             }
 
+            if(!is_array($values)) {
+                $values = array($values);
+            }
+
             // in case the node did not exist at all, create one
             if ( ($node = $dom->getElementsByTagName($name)->item(0)) === null) {
                 $node = $dom->documentElement->appendChild($dom->createElement($name));
@@ -130,6 +167,7 @@ EOF;
                 $node->appendChild($dom->createTextNode($this->toXMLValue($type, $value)));
             }
         }
+        $dom->normalizeDocument();
 
         return new Response($dom->saveXML(), 200, ['Content-type' => 'text/xml']);
     }
diff --git a/lib/Alchemy/Phrasea/TaskManager/Job/SubdefsJob.php b/lib/Alchemy/Phrasea/TaskManager/Job/SubdefsJob.php
index 3f20dc1e60..2b2c0cd593 100644
--- a/lib/Alchemy/Phrasea/TaskManager/Job/SubdefsJob.php
+++ b/lib/Alchemy/Phrasea/TaskManager/Job/SubdefsJob.php
@@ -73,6 +73,9 @@ class SubdefsJob extends AbstractJob
                 $sqlparms[] = $type;
             }
         }
+        if(count($sqlqmark) == 0) {
+            return;
+        }
 
         foreach ($app['phraseanet.appbox']->get_databoxes() as $databox) {
             if (!$this->isStarted()) {
@@ -86,11 +89,9 @@ class SubdefsJob extends AbstractJob
             $conn = $databox->get_connection();
 
             $sql = 'SELECT coll_id, record_id FROM record'
-                . ' WHERE jeton & ' . PhraseaTokens::MAKE_SUBDEF . ' > 0';
-            if(count($sqlqmark) > 0) {
-                $sql .= ' AND type IN(' . implode(',', $sqlqmark) . ')';
-            }
-            $sql .= ' ORDER BY record_id DESC LIMIT 0, 30';
+                . ' WHERE jeton & ' . PhraseaTokens::MAKE_SUBDEF . ' > 0'
+                . ' AND type IN(' . implode(',', $sqlqmark) . ')'
+                . ' ORDER BY record_id DESC LIMIT 0, 30';
             $stmt = $conn->prepare($sql);
             $stmt->execute($sqlparms);
             $rs = $stmt->fetchAll(\PDO::FETCH_ASSOC);
diff --git a/templates/web/admin/task-manager/task-editor/subdefs.html.twig b/templates/web/admin/task-manager/task-editor/subdefs.html.twig
index 26f9ff6666..4e5a077660 100644
--- a/templates/web/admin/task-manager/task-editor/subdefs.html.twig
+++ b/templates/web/admin/task-manager/task-editor/subdefs.html.twig
@@ -67,7 +67,7 @@
 {% block javascript %}
     function minmax(v, _min, _max)
     {
-        if(v == NaN || v < _min)
+        if(isNaN(v) || v < _min)
         {
             v = _min;
         }
diff --git a/tests/Alchemy/Tests/Phrasea/TaskManager/Editor/SubdefsEditorTest.php b/tests/Alchemy/Tests/Phrasea/TaskManager/Editor/SubdefsEditorTest.php
index 4e034cc356..3729129155 100644
--- a/tests/Alchemy/Tests/Phrasea/TaskManager/Editor/SubdefsEditorTest.php
+++ b/tests/Alchemy/Tests/Phrasea/TaskManager/Editor/SubdefsEditorTest.php
@@ -12,7 +12,17 @@ class SubdefsEditorTest extends EditorTestCase
             [
                 '<?xml version="1.0" encoding="UTF-8"?>
 <tasksettings>
-<sbas></sbas><type_image>0</type_image><type_video>0</type_video><type_audio>0</type_audio><type_document>0</type_document><type_flash>0</type_flash><type_unknown>0</type_unknown><flush></flush><maxrecs></maxrecs><maxmegs></maxmegs><embedded>0</embedded></tasksettings>
+  <type_image>0</type_image>
+  <type_video>0</type_video>
+  <type_audio>0</type_audio>
+  <type_document>0</type_document>
+  <type_flash>0</type_flash>
+  <type_unknown>0</type_unknown>
+  <flush>0</flush>
+  <maxrecs>0</maxrecs>
+  <maxmegs>0</maxmegs>
+  <embedded>0</embedded>
+</tasksettings>
 ',
                 '<?xml version="1.0" encoding="UTF-8"?>
 <tasksettings>
@@ -29,7 +39,7 @@ class SubdefsEditorTest extends EditorTestCase
   <type_document>0</type_document>
   <type_flash>0</type_flash>
   <type_unknown>0</type_unknown>
-  <flush>0</flush>
+  <flush>1</flush>
   <maxrecs>12</maxrecs>
   <maxmegs>1</maxmegs>
   <embedded>1</embedded>
@@ -67,16 +77,15 @@ class SubdefsEditorTest extends EditorTestCase
                 '<?xml version="1.0" encoding="UTF-8"?>
 <tasksettings>
   <customtag>value</customtag>
-  <sbas></sbas>
   <type_image>0</type_image>
   <type_video>0</type_video>
   <type_audio>0</type_audio>
   <type_document>0</type_document>
   <type_flash>0</type_flash>
   <type_unknown>0</type_unknown>
-  <flush></flush>
-  <maxrecs></maxrecs>
-  <maxmegs></maxmegs>
+  <flush>0</flush>
+  <maxrecs>0</maxrecs>
+  <maxmegs>0</maxmegs>
   <embedded>0</embedded>
 </tasksettings>
 ',