[K12OSN] yum update for K12LTSP 5.0EL fails on avahi-compat-howl

[Peter Scheie]

When I run yum update on my 5.0EL box, it fails like so:

  Downloading header for avahi-compat-howl to pack into transaction set.
http://k12linux.mesd.k12.or.us/K12LTSP/5.0.0-EL-32bit/updates/RPMS/avahi-compat-howl-0.6.16-1.el5.i386.rpm: 
[Errno 14] HTTP Error 404: Not Found
Trying other mirror.
Error: failure: updates/RPMS/avahi-compat-howl-0.6.16-1.el5.i386.rpm 
from k12ltsp: [Errno 256] No more mirrors to try.

I get a similar failure when I try to install fl_teachertool via yum WRT 
teachertool-tightvnc.

Is something amiss with MESD's repo?

Petre