Hi,
Back in October 2009, I reported on strange warm-standby problems in
this thread: http://archives.postgresql.org/pgsql-admin/2009-10/msg00170.php
Just in case anyone still cares or is wondering, we found the problem.
The machine had bad RAM; we were getting undetected/uncorrected single-bit
errors creeping through! The thing that led to the discovery was a cron
job error complaining about a "SEHECT" statement when the Perl script
clearly read "SELECT". We swapped the RAM a while back and the problem
seems to have been cured.
Regards,
David.