Although it was working previously (like a day ago), I now am not receiving any messages through the MtGox streaming API (socket.io). Code is below, am I doing anything obviously wrong? The connection message is printing out so I assume it's connected OK.

var conn = io.connect('https://socketio.mtgox.com/mtgox');

conn.on('connect', function(data) {
    console.log("Connected to Mt.Gox");
    conn.send({
      "op": "mtgox.subscribe",
      "type": "depth"
    });
    conn.send({
      "op": "mtgox.subscribe",
      "type": "trade"
    });
});

conn.on('message', function(data) {
    if ('private' === data.op) {
        if ('trade' === data.private && 'USD' === data.trade.price_currency) {
            console.log("Last trade price: " + data.trade.price);
        }
        if ('depth' === data.private) {
            if ('ask' === data.depth.type_str) {
                console.log("Ask depth added: " + data.depth.price);
            } else {
                console.log("Bid depth added: " + data.depth.price);
            }
        }
    }
});