I was changing zones to my house, when the game got stuck with the progress bar at "loading: 0%". I closed the tab and opened a new one, but now it won't go past the intro screen. It's at the last phase of the intro screen, where the spinning animation is overlaid on the center.
I've had this problem in the past as well. The other sucky thing about it is it seems like the game thinks I'm logged in, so I lose energy as if I was standing there and idle.
I've tried two different browsers, so far that hasn't helped.