I went to http://en.opensuse.org/SDB:ZEN-Updat...roblem_in_10.1
and followed the instructions there, to try and get a mirror listed in installation source in Yast (in SUSE 10.1), and then list it YOU. It failed because the installation source window would just hang when I pressed "finish" after it listed the mirror (after a long wait for "adding catalog"). I therefore never could get YOU to list the updates, let alone use the zen updater.
Smart is the only thing I have been able to get to list the content of a mirror, but I don't understand the way it is listed. I can't make sense of whether a listed .rpm is an update or not by using the smart --gui, except by clicking through them one at a time and reading descriptions below. Is there a decent guide somewhere to interpret the smart interface (because I can't make Yast or zen work at all)?