Bodge to default to '1 users' when you create a room, which is better than blindly assuming a recents controller is writing to rootScope.rooms and setting numUsersInRoom there.

webclient/recents/recents-controller.js

@@ -82,6 +82,11 @@ angular.module('RecentsController', ['matrixService', 'matrixFilter', 'eventHand
         eventHandlerService.waitForInitialSyncCompletion().then(
             function(initialSyncData) {
             
+                // XXX FIXME TODO:
+                // Any assignments to the rootScope here should be done in
+                // event handler service and not here, because we could have
+                // many controllers manipulating and clobbering each other, and
+                // are unecessarily repeating http requests.
                 var rooms = initialSyncData.data.rooms;
                 for (var i=0; i<rooms.length; i++) {
                     var room = rooms[i];

webclient/recents/recents.html

@@ -9,7 +9,7 @@
                     {{ room.room_id | mRoomName }}
                 </td>
                 <td class="recentsRoomSummaryTS">
-                    {{ room.numUsersInRoom }} {{ room.numUsersInRoom == 1 ? 'user' : 'users' }}
+                    {{ room.numUsersInRoom || '1' }} {{ room.numUsersInRoom == 1 ? 'user' : 'users' }}
                 </td>
                 <td class="recentsRoomSummaryTS">
                     {{ (room.lastMsg.ts) | date:'MMM d HH:mm' }}