[NTG-context] Layer placement problem

Hi, after I updated my ConTeXt a few weeks ago, my cover page suddenly started looking funny. As far as I understand it, the page consists of stuff piled on a layer and then the layer is placed on a page. Except that now the top edge of the layer seems to be placed at the midpoint of the page or something like that. The text that should be in the middle of the page now ends up on the bottom edge of the page. How can I align the top of the layer to the top of the page so that everything on the page shows up again? Thank you, Mari