I'm getting the same with SOAP::Lite 0.69 on SuSE 10.1, and not just with Data::Dumper but with Anything::

maybe it's a bug, and you should report it :)

as a workaround (ugly one) that works for me, you can move Wordbank directory from lib/ to the daemon root, and replace

 -> dispatch_to('/Users/johno/Code/DCI/Wordbank-DCI-Server/lib');
[download]

from the daemon code with:

 -> dispatch_to("Wordbank::DCI::Server");
[download]