Socket.io + Express CORS Error on localhost (not allowed by Access-Control-Allow-Origin)

I have a working node.js Express server to which I would to add socket.io support (allow javascript clients to connect via socket.io). I can connect to the express server via a Javascript $.get(), but the socket.io.connect() command fails due to a CORS error.

My testing machine is OSX with Apache to serve the client, thus port 80 is taken, so I have node.js/express running on port 8888. I added socket.io per the documentation:

var exp = express();
var server = require('http').createServer(api.server);
exp.listen(8888);

var io = require('socket.io').listen(server);
io.sockets.on('connection', function(socket) {
     console.log('connection'); 
});

I properly see "info: socket.io started" in my node.js logs.

Then, on the client, I attempt to connect to the server...

    this.socket = io.connect('http://localhost:8888');
    this.socket.on('connect',function() {
        socket.emit('install','test');
    });

However, I'm getting a CORS error in the console in Chrome:

XMLHttpRequest cannot load http://localhost:8888/socket.io/1/?t=1358715637192. Origin http://localhost is not allowed by Access-Control-Allow-Origin.

HOWEVER, THIS works fine!

    $.get('http://localhost:8888',function(e,d){
        console.log(e,d); 
    });

So I double checked my headers, for both localhost:8888 and localhost -- both are properly returning the headers which (should) allow for the cross-domain requests...

Access-Control-Allow-Origin: *

Any ideas?