Hi Lukas and others,
I found a couple of bugs in the RSS creation.
#If page titles contain diactrical characters or just an &, rss creation
#Some other pages also break rss creation, but if you resave (without
making any change) those pages, it rss creation works again. I even had
the impression that just view them might be repairing it :/. I can't
figure what this might be..