"Tony Fernandez" <Tony.Fernandez at vocalocity.com> writes:
> I am getting the following error:

> <stdin>:14: PGRES_FATAL_ERROR load '$libdir/xxid';  - ERROR:
> incompatible library "/usr/lib/pgsql/xxid.so": missing magic block

You need a version of xxid.so that matches your server version, on
each server.

It might well also be that you need a newer version of Slony --- I would
not expect an 8.1-vintage release of Slony to work on 8.3.

			regards, tom lane