Index: core/units/images/image_tag_processor.php
===================================================================
--- core/units/images/image_tag_processor.php
+++ core/units/images/image_tag_processor.php
@@ -462,6 +462,8 @@
 		// TODO: consider escaping in template instead
 		$params['alt'] = kUtil::escape($params['alt']);
 
+		$this->Application->Parser->DataExists = true;
+
 		return $this->Application->ParseBlock($params);
 	}