Index: trunk/core/units/general/cat_event_handler.php
===================================================================
diff -u -N -r4029 -r4043
--- trunk/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 4029)
+++ trunk/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 4043)
@@ -1496,10 +1496,9 @@
 		$available_columns = array_merge_recursive2($available_columns, $this->getCustomExportColumns($event));
 
 		// custom fields
-		$fields = array_keys($object->CustomFields);
-		foreach ($fields as $field_name)
+		foreach ($object->customFields as $custom_id => $custom_name)
 		{
-			$available_columns['__CUSTOM__'.$field_name] = $field_name;
+			$available_columns['__CUSTOM__'.$custom_name] = $custom_name;
 		}
 
 		// columns already in use