Careful where you set your doctype
Along with the resolution of this view helper bug concerning view helpers not being doctype aware, comes a small gotcha if you are relying on setting your doctype in layouts like so:
echo $this->doctype('XHTML1_STRICT');
The problem is that view helpers will not be aware of this setting and will revert to the default setting HTML4_LOOSE. To avoid this be sure to set the doctype earlier in the bootstrap process, something like so:
$viewRenderer->view->doctype('XHTML1_STRICT');

