Alternative to ZMD and Yast in Suse 10.1:
I'd suggest doing what everyone else has suggested, even Novell suggests this...
Install SMART package manager and its tray and gui components. It works way faster than Yast or Zen and its just a 1 button update to updated packages.
See here for Novell's comments: http://en.opensuse.org/Using_10.1#Work_around
See here for SMART installation: http://dev-loki.blogspot.com/
I just installed Smart and I'm very happy with it. I'm just trying to remove the ZEN updater until Novell decides to do another release of Zen, which I see they're working on it (I saw it in their software.opensuse.org folder).