I have installed 9.0 beta 4 using the one click installer for windows 32 bit and running under Vista and used the default install directories. I noticed that bytea output was in hex using my client application and also using pgAdmin 1.12.0 beta 4, so I changed the config file to bytea_output = 'escape' (removing the # comment symbol of course). I stopped and restarted the service, and the output is still in hex.
