They give you 7 days till it becomes your permanent layout after you click it when you see the new layout on another friend.
I don't know what's private and what can be seen by everybody anymore. You used to have a preview function to see how others see your profile, that shit doesn't exist anymore.
It looks weird now, status updates and pics left and right on something called Timeline, WTF?
ninyahow let my predicament be a warning, don't click when they ask you to try it out. It's too late for me, I messed up. I love to click on stuff bro, am a compulsive clicker.