Don't know if was in this update, not had the phone long. But there as a gaping usability bug. If an app goes full-screen, it is virtually impossible to exit it, since the back/home/switch buttons disappear. If you kill the screen, then come back in, the app that was full-screen re-establishes itself. You are forced to rely any provisions of that app to get back to a usable phone, which may not be available if the app has become unresponsive. You can't even get to the power-off menu. And you can't take the battery out to force a restart. So you might be left with waiting for the phone to drain its power before you can use it again, which might take several days.
I think I will go the factory reset route, then never update. I very much doubt a newer update will fix these problems. The bigwigs are not interested in their users. And probably avoid Samsung in future. And Apple. And Google. And the rest of them. They're all as bad as each other, including the network providers who are switching off 2G/3G, so you can't even go back to an old-skool Nokia classic.
