Nice to have this back! But I have a few issues with it:

Sometimes when I click the 'go to first unread message' button next to the thread title (two down arrows), I just takes me to the very last message of the thread and not where I left the last time I was here.
Editing a reply in advanced does not show the usual button to insert image, url, emoticons etc. Is this a browser problem? I am using chrome (both Mac and Win).