"No address associated with nodename"

< ^ > P N |<>|^_>< --- | ~ ...Help

Once again my ignorance of all things networky bite me. Can anybody 
explain what this message might mean?

/usr/local/lib/ruby/1.8/net/ftp.rb:350:in `gethostbyname': getaddrinfo: 
No address associated with nodename (SocketError)
         from /usr/local/lib/ruby/1.8/net/ftp.rb:350:in `getaddress'
         from /usr/local/lib/ruby/1.8/net/ftp.rb:373:in `login'

-- 
RMagick OS X Installer [http://rubyforge.org/projects/rmagick/]
RMagick Hints & Tips [http://rubyforge.org/forum/forum.php?forum_id=1618]
RMagick Installation FAQ [http://rmagick.rubyforge.org/install-faq.html]