TYPO3.Comments

I just had the case that I came in contact with the proxied representation of my "parent" entity, so it wasn't \Acme\Blog\Domain\Model\Post but TYPO3\FLOW3\Persistence\Doctrine\Proxies\AcmeBlogDomainModelPost.
The chain was nothing more than

http://example.org/acme.blog/post/show?post[__identity]=abcd-12345-ehff

controlled by

public function showAction(\Acme\Blog\Domain\Model\Post $post) {
    $this->view->assign('post', $post);
    // get_class($post) is that proxy one, also in all subsequent occurences/usages
}

Basically that lead to my CommentsViewHelper not working anymore, but I wonder if that might make trouble also in current, present implementations; in the Widget controller there is also just used get_class($object).
I just absolutely don't know in what cases a proxy occurs and in what it doesn't.
Maybe you can say if that might be a problem.