Hi Stefan,

Thanks for replying again. There were no paragraphs signs, I had checked
that already.

Anyway, it seems it was something wrong with that particular document
because I selected all and copied it into a new document and there the
footnotes didn't leave so much space beneath them. It was still not perfect
but way better and the rest of the problem, I discovered, came from some
"spaces" in the footer section.
I still don't know why copying the whole stuff into a new document was able
to solve this but it did...
Thanks for your help anyway