I tried the forum search box, the Google search box, and searching Google from my browser with the qualifier site: progresstalk.com. In each case the search text was "_tablestat-read".
The site search gives me two hits from the same thread, dated Nov 5 1999.
Google gives me five hits, including one from the 1999 thread.
The custom Google site search seems to give the same five hits.
Then I tried the PT custom Google search with the search term blockdelete. It came up with 4,080 hits. Most of the hits on the first page were from google.com/patents. None were from the domain progresstalk.com.
I tried a google search on this site for "checkpoint duration". I got 4 hits. The custom site search gave me 7 hits; those four plus hits from google.com/maps and google.com/patents. The site search box (the old one) gave me no hits.
So I think further tweaking and testing is required before either of these search methods is declared to be working.