This helps, that is, in the boxes that contain hungryfeeds. In the first box I used [display posts] and thus had to apply the same css for ul.display-posts-listing. I also changed the height to 120px, just to prevent the boxes from going to big. Works just fine.
I understand correctly that for different content I should customize the css? I t works, but there is no way to position the button regardless of content?
thx for your help and quick reply!