Perl IO::Socket name resolution issues

[Dennis Jacobfeuerborn <d jacobfeuerborn conversis de>]

I'm seeing weird problems with IO::Socket in the syslog:

Jun  3 01:46:20 nexus ddclient[2201]: WARNING:  cannot connect to 
checkip.dyndns.org:80 socket: IO::Socket::INET: Bad hostname 
'checkip.dyndns.org'
Jun  3 01:51:20 nexus ddclient[2201]: WARNING:  cannot connect to 
checkip.dyndns.org:80 socket: IO::Socket::INET: Bad hostname 
'checkip.dyndns.org'
Jun  3 01:56:20 nexus ddclient[2201]: WARNING:  cannot connect to 
checkip.dyndns.org:80 socket: IO::Socket::INET: Bad hostname 
'checkip.dyndns.org'
Jun  3 02:01:20 nexus ddclient[2201]: WARNING:  cannot connect to 
checkip.dyndns.org:80 socket: IO::Socket::INET: Bad hostname 
'checkip.dyndns.org'

I tried a "ping checkip.dyndns.org" and that works fine. Anybody else 
seeing this?

Regards,
  Dennis