title: Emberjs bindAttr not working with ember version 1.0.0-rc.1
body: <p>I'm using the code from this <a href="http://jsfiddle.net/EsF4R/3/" rel="nofollow">JSFiddle</a> to try to do something similar (which uses Ember version 0.9.3). However when I use the code with the newer version of Ember (1.0.0-rc.1) the handlebars bindAttr in the input tag on line 11 doesn't seem to be working. </p>
  
  <p><a href="http://jsfiddle.net/9HeQG/4/" rel="nofollow">Here</a> is a version of the same JSFiddle but using the new Ember version. You can see in the output that already the same functionality is not there. </p>
  
  <p>What changed in the new version of Ember and how can I remedy it?</p>
  
  <p>Here is the html which is the same in both JSFiddles:</p>
  
  <pre><code>&lt;script type="text/x-handlebars"&gt;
  {{view Em.RadioButton title="1" option="1" group="default" valueBinding="App.radio1"}}
  {{view Em.RadioButton title="Ohai" option="Words" group="default" valueBinding="App.radio1"}}
  {{view Em.RadioButton title="3" option="3" group="default" valueBinding="App.radio1"}}
  {{view Em.RadioButton title="Dog" option="Dog" group="default" valueBinding="App.radio1"}}
  {{view Ember.TextField valueBinding="App.radio1"}}
  &lt;/script&gt;
  </code></pre>
  
  <p>And here is the JS which is the same in both JSFiddles:</p>
  
  <pre><code>(function(exports) {
  var set = Ember.set, get = Ember.get;
  Ember.RadioButton = Ember.View.extend({
  title: null,
  checked: false,
  group: "radio_button",
  disabled: false,
  
  classNames: ['ember-radio-button'],
  
  defaultTemplate: Ember.Handlebars.compile('&lt;label&gt;&lt;input type="radio" {{ bindAttr  disabled="disabled" name="group" value="option" checked="checked"}} /&gt;{{title}}&lt;/label&gt;'),
  
  change: function() {
  Ember.run.once(this, this._updateElementValue);
  },
  
  _updateElementValue: function() {
  var input = this.$('input:radio');
  set(this, 'value', input.attr('value'));
  }
  });
  
  })({});
  
  App = Ember.Application.create({
  radio1: ""
  });
  </code></pre>