JSON request in node.js on Windows fails to pull data

I've written a node.js page to grab some data from the flick API and then insert it into a database.

The code works perfectly on linux-- but when I moved it to a Windows machine running the latest version of node.js it seems that the data isn't parsing correctly.

var options = {
  host: 'api.flickr.com',
  port: 80,
  path: '/services/rest/?method=flickr.photos.search&api_key=aa96a1b927fbf005374eb19d811ed529&tags=cars&format=json&nojsoncallback=1&page='+page
};          

http.get(options, function(res){        
    var data = '';
    res.on('data', function (chunk){        
        data += chunk;
    });
    res.on('end',function(){ 
        var obj = JSON.parse(data);
        console.dir(obj.photos.photo); // empty array on Windows, fine on linux!
    })
});

I also verified the data by making a test request in a web browser for the same data-- the photos.photo element should definitely be populated.

Is there a reason this could be happening, such as I'm missing a library or plugin on Windows? Or could memory be affecting this?