I am trying to tidy up/reconfigure after upgrading from xubuntu 11.04 to 11.10. Most things are working but I'm getting a couple of errors that suggest that I have somehow lost my FQDN setting.

Both apache2 and leafnode are complaining:-

apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName #012Leafnode must have a fully-qualified and globally unique domain name,#012not just "chris".

Now I know I *can* fix apache2 by putting a ServerName directive in /etc/apache2/apache2.conf but I didn't have one before. Also the leafnode configuration is unchanged from 11.04 so why am I now getting the error about FQDN?

It's probably something very silly I have forgotten somewhere but I really can't see it at the moment. Has anyone any ideas what might be wrong/missing?

Oh, the /etc/hosts file on the system is unchanged from 11.04 to 11.10 and has very little at all in it, the system (which is chris, 192.168.1.4) obtains its network settings by DHCP from the DHCP server at 192.168.1.2 which hasn't changed.