Gluster users - Apr 2010 - unix sockets and client

dear users
having this simplistic config on client:

volume vmail
     type protocol/client
     option transport-type unix
     option transport.unix.connect-path /var/run/glusterfsd.d/vmail.sock
     option remote-subvolume vmail
end-volume

these are being logged:
option transport.unix.connect-path not specified for address-family unix

I surely am missing something, but what?

regards