sshd fails reverse dns lookup / host accomplishes reverse dns

[Hanasaki JiJi]

computer1 and computer2
        - both run woody
        - both have the same /etc/resolve.con
        - both have the same ssh config

ssh from 1 to 2 - no problems
ssh from 2 to 1 - sshd reports a failed reverse dns lookup

host [ip of computer1] - works on all systems

Any ideas as to why computer2 would be having such problems?

Thank you.