Ok!!! Setting 'trust' instead of 'md5' works well!!
Now psql doesn't ask me the password while pgAdmin III works too and ask
me the password (why this difference???).
<confused on>
I continue to wonder why I got 2 different behaviours on my 2 PCs. At
home I have 'md5' and it works! ;)
<confused off>
Regards.
Andrea
> replace the md5 with trust, and try again.
>
>
> # IPv4 local connections:
> host all all 127.0.0.1/32 trust