I know. It's been this way off and on for several days. I've had to repost several comments, as well as mail, at least two or three times. I hit "post" and it says "done", giving me a blank screen instead of taking me back to the thread, or telling me that my mail has been sent.
Fortunately, I've learned to hit the back arrow and retrieve the message, open another window and see if my post went through or not before 'sending' it again.