During the course of today, I noticed the stale-page problem off and on about three times.   I presume that there is a load-balancer in play here on these “beefy servers,” and I strongly suspect that there is something amiss specifically when serving-up a GET-parameter-free (i.e. “home”) URL on probably-one, but not all, of those servers.   I am only accessing the .org domain.   I have never noticed staleness on any other page, ever.   And at this point, I know it is not client-side.