Migrating from 32 bit using pg_basebackup Has anyone migrated a 32 bit postgres 9.2 database to a 64 bit postgres 9.2?

I'm trying to use pg_basebackup but I'm not sure whether this is the right approach.
pg_basebackup is not the right approach. It won't work, because the 32-bit and 64-bit data directories are not compatible.

You will have to dump and reload using pg_dump and pg_restore, plus a pg_dumpall --globals-only restored via psql for user accounts etc.