Behavioral change in hostname

[Robert Moskowitz]

I just tracked down a problem a couple of us are having with the 
'hostname -f' function in FC10.

It seems that at some release there was a change in creating the 
/etc/hosts file from:

127.0.0.1   FQDN   host   localhost.localdomain localhost

to:


127.0.0.1   localhost.localdomain localhost   FQDN   host

So 'hostname -f' use to return FQDN, now it returns localhost.localdomain.

I am only running Centos 5.3 and FC10 here right now and I see the 
difference between the two. 

When did this change occur?

What can be done to get 'hostname' to always figure out to return the 
FQDN if one exists?