[CentOS] Yumex-Error in loading repository data

Sun Sep 28 21:42:03 UTC 2008
Josh Donovan <josh.dvan at yahoo.co.uk>

On a CentOS 4 desktop Yumex gives the error message 
"Error in loading repository data" but yum works fine
from the cli. Could something have been broken in
yumex? Putting yumex in debug mode does not give me
clues as to the error message.