repomd.xml from kde community repo is not digitally signed

I was doing a regular update when I got the following error message:repomd.xml from kde community repo is not digitally signed. Please suggest.

Cross_AM wrote:
>message:repomd.xml from kde community repo is not digitally signed.

See
http://lists.opensuse.org/opensuse-buildservice/2009-03/msg00001.html

Kind regards,
Andreas Stieger