When I quote a post in firefox, it shows the HTML code of the message as well. It also made firefox give me a random crash... but then again, it might just be that time of the month for firefox.
EDIT: I like how we've got the new style of editing posts.
scroll waaaaaaaay down to the very bottom of this page. On the left, there is a style selector down there, so you can just pick the one you had before.