Not sure what's going on here, I'm using Google Chrome and when I click on the leaderboard in multiplayer the board pops up, totally empty, then when I click close the game stops responding and the entire page needs to be refreshed. Happens for my friends who all use Chrome too.
The leaderboard is really large right now, so it takes a long time to load. It *will* eventually finish loading if you wait. One of the coming fixes is to not load all of it at once so it is better-behaved.