Sorry Chuck but I don't see the "Custom" link just below the forum description that you mentioned. I see the Search box in the upper right hand corner of the main screen. Is this what you are referring to?
Maybe they now include all archived (older than a certain date) posts when you do a search? I thought there was a cut off date beyond which there was a special archive that you had to go to, to view the older posts.
I've seen some references to this archive but at this time cannot locate them.