Facebook prototype glitch

Interesting situation earlier today. I wonder how you accidentally expose a prototype Facebook page layout to the world. One thing I noted that changed is that Facebook chat worked over https while the prototype was live. I use the HTTP Everywhere Firefox addon which secures my Facebook usage from the likes of Firesheep and friends, but breaks chat in the process. I wonder whether that has been fixed internally. I use Pidgin as a workaround at the moment, but it would be nice if https chat was fixed and https was used by default everywhere. It is quite annoying when hijacking someone’s account is that easy.