Henry: This has been working for me...and still does.
For me, using Firefox, a new tab opens within the new window that opens when you click on the # of replies.
That is a confusing sentence. Basically, I click on the # of replies and get a new window which lists everyone who has posted with the number of their posts. I click on the number of posts for an individual and get a new tab within the same window which features all of that member's posts in that thread. Hope that is clearer (but I am doubtful).
