diff --git a/code/hooks.js b/code/hooks.js
index e0633691..629c5ff3 100644
--- a/code/hooks.js
+++ b/code/hooks.js
@@ -43,7 +43,8 @@
 //              array [GUID, time, details]. Plugin can manipulate the
 //              array to change order or add additional values to the
 //              details of a portal.
-// requestFinished: called after each request finished. Argument is
+// requestFinished: DEPRECATED: best to use mapDataRefreshEnd instead
+//              called after each map data request finished. Argument is
 //              {success: boolean} indicated the request success or fail.
 // iitcLoaded: called after IITC and all plugins loaded
 
@@ -72,7 +73,11 @@ window.runHooks = function(event, data) {
 
 
 window.addHook = function(event, callback) {
-  if(VALID_HOOKS.indexOf(event) === -1) throw('Unknown event type: ' + event);
+  if(VALID_HOOKS.indexOf(event) === -1) {
+    console.error('addHook: Unknown event type: ' + event + ' - ignoring');
+    return;
+  }
+
   if(typeof callback !== 'function') throw('Callback must be a function.');
 
   if(!_hooks[event])
diff --git a/code/map_data_request.js b/code/map_data_request.js
index 4c839407..3b37eb1b 100644
--- a/code/map_data_request.js
+++ b/code/map_data_request.js
@@ -368,6 +368,9 @@ window.MapDataRequest.prototype.handleResponse = function (data, tiles, success)
       var id = tiles[i];
       this.requeueTile(id, true);
     }
+
+    window.runHooks('requestFinished', {success: false});
+
   } else {
 
     // TODO: use result.minLevelOfDetail ??? stock site doesn't use it yet...
@@ -407,6 +410,8 @@ window.MapDataRequest.prototype.handleResponse = function (data, tiles, success)
       }
 
     }
+
+    window.runHooks('requestFinished', {success: true});
   }
 
   this.processRequestQueue();