Is there a way to go to the first unread post on a thread?

[MaryEllen]

Please any time this happens, let me know details (which browser, what thread, how long since you viewed that thread if you remember...). I'm watching to see if I need to do anything about it.

It just happened. I clicked the arrow to go to the "what to do when child dislikes book" thread in Form II. I had read the thread yesterday, today it took me to the last post in the thread but there were a number of posts above it that I had not seen. (7, to be exact)

I am using Firefox 3.6.28