Index: trunk/core/kernel/db/dbitem.php
===================================================================
diff -u -N -r8481 -r8563
--- trunk/core/kernel/db/dbitem.php	(.../dbitem.php)	(revision 8481)
+++ trunk/core/kernel/db/dbitem.php	(.../dbitem.php)	(revision 8563)
@@ -979,15 +979,18 @@
 		}
 
 		$cdata_key = rtrim($this->Prefix.'-cdata.'.$this->Special, '.');
-		$cdata =& $this->Application->recallObject($cdata_key, null, Array('skip_autoload' => true));
+		$cdata =& $this->Application->recallObject($cdata_key, null, Array('skip_autoload' => true, 'populate_ml_fields' => true));
 
 		$resource_id = $this->GetDBField('ResourceId');
 		$cdata->Load($resource_id, 'ResourceId');
 		$cdata->SetDBField('ResourceId', $resource_id);
 
 		$ml_formatter =& $this->Application->recallObject('kMultiLanguage');
+		/* @var $ml_formatter kMultiLanguage */
+
 		foreach ($this->customFields as $custom_id => $custom_name) {
-			$cdata->SetDBField($ml_formatter->LangFieldName('cust_'.$custom_id), $this->GetDBField('cust_'.$custom_name));
+			$force_primary = isset($cdata->Fields['cust_'.$custom_id]['force_primary']) && $cdata->Fields['cust_'.$custom_id]['force_primary'];
+			$cdata->SetDBField($ml_formatter->LangFieldName('cust_'.$custom_id, $force_primary), $this->GetDBField('cust_'.$custom_name));
 		}
 
 		if ($cdata->isLoaded()) {