These two queries produce different output, using version 8.3.3:
SELECT '2008-01-01 00:00:00+00'::timestamptz AT TIME ZONE 'MDT';
SELECT '2008-01-01 00:00:00+00'::timestamptz AT TIME ZONE 'America/Boise';
..is this a bug?
Note: "America/Boise"="MDT" (from pg_timezone_names)
Best regards,
--
Dave Witt