aFarkas/html5shiv — comment on commit cee53872509ee9aafad04ddaca8117ac72ba3b23
File: src/html5shiv-printless.js line 41
By jdalton:

So for `element.document` it seems only the `element.document.createElement(html5Tag)` needs to be done:
http://jsbin.com/oyikad

Which means those element's don't need any methods paved *(maybe you could put a check to avoid unnecessarily paving host methods)*.