No, no need for that. It took me half an hour to figure that problem out myself and it's an indication of how generally badly designed is cocoon's handling of multipart-encoded POST requests.
Could it be useful to document this "feature" along with the usage instructions?
Anyway, I'm wondering why the multipart request. Is it because of images? If it weren't for images, wouldn't it be better to POST a text/xml body with all the necessary information, putting the "verb" (save, delete, etc.) in the URI, in the style of REST?
Ugo
-- Ugo Cei - http://www.beblogging.com/blog/