title: Checkbox problems with meteor template and blaze
body: <p>I have some code that was working happily pre-blaze that is now not working as expected post blaze and the changes to checkbox handling.</p>
  
  <p>The code is pretty simple</p>
  
  <pre><code>  &lt;div class="modal-footer"&gt;
      &lt;label for="packed" class="checkbox-inline input-lg"&gt;Packed&lt;/label&gt;
        &lt;input type="checkbox" name="packed" id="packed" checked={{isPacked evt}}/&gt;
      {{#if isPacked evt}}
        Packed
      {{else}}
        Not Packed
      {{/if}}
      &lt;label for="delivered" class="checkbox-inline input-lg"&gt;Delivered&lt;/label&gt;
        &lt;input type="checkbox" name="delivered" id="delivered" disabled={{disDelivered evt}}  checked={{isDelivered evt}}/&gt;
      &lt;button type="button" class="btn btn-default" id="closeEdit"&gt;Close&lt;/button&gt;
    &lt;/div&gt;
  </code></pre>
  
  <p>The line "Not Packed" is displayed as expected, but, the check boxes are both checked (although both tests return false) and delivered is, as expected disabled.</p>
  
  <p>I can't for the life of me work out why the check boxes are now checked even though the test returns false.</p>