Best answer as chosen by user Oddible: Told by support that Samsung botched a Smart Hub update toda
Was told by support that Samsung botched a Smart Hub update today and a lot of users were reporting problems. My Smart Hub kept updating over and over and each time I lost more and more icons from the home page. At this point I have only Your Videos, nothing else. Hope they get this resolved soon!
Another point... service providers should have a clearer problem notification system for users, like what many video game services offer. Error messaging should report that there is a system error and techs are working on it, and there should be a website or an in-app system status notification.