pg_dump and minor versions

Short question:

While playing around with various postgresql installations i recognized 
that pg_dump complaints even within major-releases about different 
minor-numbers, such as:

pg_dump: server version: 8.2.4; pg_dump version: 8.2.0

I thought we are safe against pg_dump changes within a minor release, or 
i'm wrong?

--  Thanks
                   Bernd