2011/3/23 Martín Marqués <martin(dot)marques(at)gmail(dot)com>:
> The scenario is like this. I tried today to dump a DB from our
> production server to load on our development server and got some
> errors, which I show below.
Try using the pg_dump from the 8.4 install to create your dump file.
Also make sure your 8.3 installation doesn't have a non-default bytea
encoding setting (not sure when that setting was introduced, so there
may not even be such a setting).