After an update of weblocks, i found the render-widget system that
loop over the childrens of the root widget, broken in the Dataform widget.
In my code, i put some childrens in the Quickform widget
(Quickform inherits from Dataform).
On 4 Jul 2013, appears a update of dataform code
that cause the trouble :https://github.com/skypher/weblocks/commit/af617413a1ca22e6891b34b93fa81e936209d702
Why a new "widget-children" method in this class (Dataform) that breaks the render-widget engine ?