d3.js force-collapsible with labels

I am having some trouble trying to re-create

I've attempted to add the features of http://bl.ocks.org/950642 to http://mbostock.github.com/d3/talk/20111116/force-collapsible.html

and tried to do:

node.enter().append("text")
      .attr("dx", 12)
      .attr("dy", ".35em")
      .text(function(d) { return d.name });

However that results in the circles disappearing and all the text is clumped in the top left corner.

Any ideas what I might be doing wrong? Here is my JS:

here is a jsfiddle: for some reason it isn't working though here because of the .json file I think...

http://jsfiddle.net/vMw2N/5/

var width = 960,
    height = 500,
    node,
    link,
    root;

var force = d3.layout.force()
    .on("tick", tick)
    .charge(function(d) { return d._children ? -d.size / 100 : -30; })
    .linkDistance(function(d) { return d.target._children ? 80 : 30; })
    .size([width, height]);

var vis = d3.select("#chart").append("svg")
    .attr("width", width)
    .attr("height", height);

d3.json("../data/flare.json", function(json) {
  root = json;
  root.fixed = true;
  root.x = width / 2;
  root.y = height / 2;
  update();
});

function update() {
  var nodes = flatten(root),
      links = d3.layout.tree().links(nodes);

  // Restart the force layout.
  force
      .nodes(nodes)
      .links(links)
      .start();

  // Update the links…
  link = vis.selectAll("line.link")
      .data(links, function(d) { return d.target.id; });

  // Enter any new links.
  link.enter().insert("line", ".node")
      .attr("class", "link")
      .attr("x1", function(d) { return d.source.x; })
      .attr("y1", function(d) { return d.source.y; })
      .attr("x2",