Solved! the unpublished Documents where listed when logged in only.
Sorry for the confusion.
Need to add some more facts for your understanding.
In that site we use parent documents as folders for certain products (groups). We have several product groups. The client was sure, when he sets the parent Document to hidden, that all the child elements (products of that group) would be hidden as well.
So it would really help, if it would be possible to hide all documents from search of a certain template, when the parent document is hidden, making it possible to hide whole product groups with one click.
your advise is much appreciated!
Solved
this is a nasty one. When the FieldsetTapOpen is set to "collapsed only when blank", you can't access any fields inside this fieldset when creating a new document.
bbeer's post in search includes hidden pages was marked as the answer