When my OS was upgraded, I had to start typing the FQDN for all of the servers I used for work. I knew it had something to do with /etc/hosts on other Linux machines.
The file that needs to be changed for OSX is /etc/resolv.conf. there is a line that begins with search. Add the domain names that you want appended and it will append them in order until if finds the host.
sheltonn February 8th, 2013