Oh, and the other day there was a bug that eventually showed 190,000 BTC on the buy side at a random number. Refreshes of the whole page fix these bugs.
Market depth is not being updated without a refresh. Time & Sales might be broken too.
I just launched some new code. Keep an eye on the depth table, and hopefully the problem will be fixed without the need to refresh. If Time & Sales aren't showing up, then the socket has gone down (most likely). When in polling mode, T&S won't show up at all (yet).
I'll have to look into how individual orders show up in the book and if there are errors there. Anything you notice on this front will help as well.
Oh and the little tick chart is now back in the top right corner, and there are some more options for price grouping intervals.