Getting the same result now with IE 11.
Example embed: http://jsfiddle.net/r8ZBT/embedded/result/
Result in F12 console: http://sol.bashcdn.net/38-jWZnBraINePftI.txt
The embed does not see me logged although I currently am. Attempting to send a message will result in login popup. I am able to see messages in the main chat.