I don't know what that means. I've mailed Reinhard and sahll tell you if I find out what has happened.
One possible reason: We have increasing difficulties at German universities with what we put on the web for everyone's use. It has happened already that if someone makes a power point supported lecture and loads down a picture or two from the web just for a short break in an otherwise dull narrative (let's say a picture of Babbage and his apparatus for the history of computing) and puts the PP in the net as a service for the students that someone who holds the copyright for these pictures sues the university for infringement of copyright. We have been warned that next time the university will make us pay the fine.