Index: program/js/app.js
===================================================================
--- program/js/app.js	(revision ebf8726eeaa507096ef28e776303b459c401a924)
+++ program/js/app.js	(revision 8879ed44b2befc2404048a6c91d8ca72bb422183)
@@ -2473,5 +2473,4 @@
 
 	if (!content.match(/add2attachment/)) {
-	alert(content)
 	  rcmail.display_message(rcmail.get_label('fileuploaderror'), 'error');
 	  rcmail.remove_from_attachment_list(e.data.ts);