Suse 11.1 - error message while installing rpm's

I’m trying to install skype with the rpm I downloaded using Konquerer. It start to install but then it stops and I get the following error message:

Following packages haven’t been found on the medium:

This is strange because yesterday when I installed on Suse 11.1 it went in without a hitch. I have since done (for different reasons) a re-install of Suse 11.1 without changing any hardware and installing the same software packages.

I also get this error message with other rpm’s.

I have since found out, at least with skype, if I go and click on the link to download on their website and choose “Install Software (Yast)” that it works ok.
Is there a bug in Yast?