Body text disappears when editing image-composition node

In my (not ready to tag) module http://drupal.org/project/image_composition I can edit the body text, it gets saved but editing again shows an empty body.

The source http://cvs.drupal.org/viewcvs/drupal/contributions/modules/image_composi... gives me no clue.

Any idea?

(plug: for a demo see: http://image-composition.paddepoel-noord.nl/)

Tanx.