What... the heck... what the first person said should be said over and over again: WHY would you post this? No no, add one thing to that: WHY would you post this... on a minecraft website? O.O
Herobrine was at one time real, but was taken out a while ago and still hasn't been put back in so if you think you've seen it, your eyes are tricking you, because herobrine is, atm, NOT REAL!
If you keep reloading the page it will eventually work... it did for me at least.... don't worry, this has happened before, it will start working in at the most a few hours And it has happened to me before the 1.3.1, so it isn't necissarily because of that.