Possible faye bug?

client.js

var faye = require('faye');

var client = new faye.Client('http://localhost:8000/');

client.subscribe('/test', console.log);
client.publish('/test', 'Hello world.');

output

undefined has published a message to /test
bidmexivn4iaz2g5uwgrroq7a4dzdad has subscribed to /test

server.js

var http = require('http'),
    faye = require('faye');

var server = http.createServer(),
bayeux = new faye.NodeAdapter({mount: '/'});

bayeux.on('subscribe', function(id, channel) {
  console.log(id + ' has subscribed to ' + channel);
});

bayeux.on('publish', function(id, channel, data) {
  console.log(id + ' has published a message to ' + channel);
});

bayeux.attach(server);
server.listen(8000);