node.js mdns failure

Mac OS X Snow Leopard

node version 0.5.0-pre
npm version 0.3.18

# mdns has been installed - npm install mdns (source: https://github.com/agnat/node_mdns)

var browser = mdns.createBrowser('http');
browser.on('serviceUp', function(info, flags) {
  sys.puts("Up: " + sys.inspect(info));
});
browser.on('serviceDown', function(info, flags) {
  sys.puts("Down: " + sys.inspect(info));
});
browser.start();

save as file.js

node file.js

# Node silently exits