Yup, it's part of the update to a better version of XenForo. You can now ignore people and we can now wanr people - hurrah!
Unfortunately, the new upgrade conflicts with the old template so Steve is currently working on new templates for all four of our sites and I think REN is third on the list for improvements. Once it has been sorted, the notifications will be back to normal - as will any missing images or other bits and bobs. Obviously if anyone notices anything groundbreakingly bad, let us know and I can get him to fix it