fixed: this.routes_request is a deferred/promise

core/js/router.js

@@ -4,11 +4,7 @@ OC.Router = {
 	// register your ajax requests to load after the loading of the routes
 	// has finished. otherwise you face problems with race conditions
 	registerLoadedCallback: function(callback){
-		if(this.routes_request.state() === 'resolved'){
-			callback();
-		} else {
-			this.loadedCallback = callback;
-		}
+		this.routes_request.done(callback);
 	},
 	routes_request: $.ajax(OC.router_base_url + 'core/routes.json', {
 		dataType: 'json',