I am unable to post any comments, and am getting a websocket error instead. The error in my console is:
The connection to ws://sockets.ny.stackexchange.com/ was interrupted while the page was loading.
This prevents me from adding a comment, and this error is also thrown for other things such as up and down votes.
My browser: Latest Firefox 20 on OS/X 10.8
Disabling noscript had no effect.
EDIT Sorry, I can't comment at the moment, so I will respond here. Indeed it's still a beta build, but I figured I would still want to make SO aware of this. It could become a problem once it is released.