diff --git a/code/map_data_request.js b/code/map_data_request.js
index 1c112a88..ae53421e 100644
--- a/code/map_data_request.js
+++ b/code/map_data_request.js
@@ -501,6 +501,9 @@ window.MapDataRequest.prototype.handleResponse = function (data, tiles, success)
 
     }
 
+    // TODO? check for any requested tiles in 'tiles' not being mentioned in the response - and handle as if it's a 'timeout'?
+
+
     window.runHooks('requestFinished', {success: true});
   }