Comment 7 for bug 175709

Darn!

After my premature comment, I noticed this:
======================================
https://bugs.launchpad.net/ubuntu/+source/kaffeine/+bug/125835
======================================

Note the comments near the bottom, apparently it's on wishlist because of licensing issues - basically thereby meaning we can't have this feature for now.
It also seems to offer a workaround, I may try it but probably won't report my result.
Suddenly it all makes sense, how unfortunate :-)