unwanted pagebreak in footnote

Setting

\interfootnotelinepenalty=10000

should prevent all footnotes from breaking over a page.

It is difficult to reproduce the behaviour, but I have following suggestions:

1. Try loading the package bigfoot, which does wonder to the layout of footnote.

2. Try adding the command \enlargethispage{\baselineskip} to increase the type block, or \enlargethispage{-\baselineskip} to reduce type block.

3. Try rephrasing the text so the footnote reference is another place in the sentence and on the page.

4. Try adding a \nopagebreakat the end of the footnote.

   \footnote{\url{https://www.apple.com/pr/library/2008/04/03iTunes- Store-Top-Music-Retailer-in-the-US.html} - besucht 14.08.2012 \nopagebreak}