When you find an old post needing your reply, you could right-click its "Post Reply" link and select "Open in New Window" from the popup menu (or, however your browser accomplishes it). The new window would have the triple benefit of negating any need for such digging, preserving your place in the old window and staging all the replies you wanted to post.
Just passing along a helpful hint, without denying my selfish motive.
Thanks. But if I did that and I had 25 things I wanted to reply to, then wouldn't I have 25 windows open (plus my original 2)?
SD