one-to-many should render the labels along with form widgets

I use a form type like this with inline type "standard":

            ->with('Challenges')
                ->add(
                    'challenges',
                    'sonata_type_collection',
                    array(),
                    array(
                        'edit' => 'inline',
                        'inline' => 'standard',
                        'admin_code' => 'acme_blocks.block.testimonial.admin',
                ))
            ->end()

this ends up rendering without any labels whatsoever. i don't get how that could be useable for anybody

![broken](https://f.cloud.github.com/assets/76576/1519895/1db71f44-4b6f-11e3-9f47-bd394020df5a.png)

if i do form_row instead, it looks nice.

![fixed](https://f.cloud.github.com/assets/76576/1519894/1644a524-4b6f-11e3-8763-0d5dbbe97125.png)

but the corresponding orm_many_to_one template also is using form_widget only, so i wonder what is going wrong here. @rande any chance you can help me understand what was supposed to happen and how the orm looks in a similar scenario?