diff -r 7070250bf50d -r 0a927fe4541b web/application.py
--- a/web/application.py	Fri Dec 09 12:14:11 2011 +0100
+++ b/web/application.py	Fri Dec 16 12:30:12 2011 +0100
@@ -450,7 +450,7 @@
         req.remove_header('Etag')
         req.reset_message()
         req.reset_headers()
-        if req.json_request:
+        if req.ajax_request:
             raise RemoteCallFailed(unicode(ex))
         try:
             req.data['ex'] = ex