[Plugin: Visual Form Builder] Checkbox labels have wrong "for" attributes

I found a bug in creating checkbox form entries. I’m getting this chunk of html for checkboxes:

<span>
  <input type="checkbox" class="checkbox" value="Lorem ipsum dolor sit amet, consectetur adipiscing elit." id="vfb-checkboxes-3-19-0" name="vfb-checkboxes-3-19[]">
  <label class="choice" for="vfb-checkboxes-3-19-1">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</label>
</span>

As you can see, the for attribute is wrong. The result is that clicking on the label always check the next checkbox, and then the last one doesn’t work.

This happens to me for each kind of checkbox I create. Radiobuttons too.

http://wordpress.org/extend/plugins/visual-form-builder/