Comment # 1 on bug 902823 from Bernhard Wiedemann

I can not reproduce this using
zypper ar
http://download.opensuse.org/repositories/KDE:/Unstable:/Frameworks/openSUSE_Factory/
test
zypper ref

could be a problem with some download-mirror, 
which we could get further insight from 
tail -1000 /var/log/zypper.log