RussellC - 7:31 pm on Sep 2, 2002 (gmt 0)
I have noticed something different just recently with one of my regularly crawled sites. Say I get a fresh tag on Aug 31 and then today I don't have a fresh date. The current cache of the page is still from Aug 31 even though it has no date. It used to revert back to a month old cache when there was no fresh date, now it keeps the freshest. Much better.