IHCClient.enable_runtime_notifications now take an array of resource id and a new IHCClient.enable_runtime_notification has been added for a single id.
IHCController.add_notify_event has a new parameter delayed (default False), when set the enable notify request will be done delayed from the notification thread.
The old IHCClient.enable_runtime_notifications had a bug - the soap action name was not set correctly, but it looks like the IHC controller did not care, so it was actually working anyway