I have three databases in different machines: a pgsql server version 8.2.4, a pgsql server version 8.1.4 and another pgsql client version 8.3.5. Is there a problem to make vacuum with client newer than server? For example: To use vacuumdb of client version 8.3.5 to make vacuum in server 8.2.4 or in server 8.1.4.