Psion,
You have provided me enough information to know you are still using 2007-2009 installs. These repos have been frozen and will no longer be updated. We are pushing toward 2010 and there is a totally new repository for 2010 to keep from breaking 2009 installs. If you venture to try and update a 2007-2009 install with the newer repositories you will break your install. So, you can wait until 2010 becomes stable and reinstall, or work with what you have. 2007-2009 repositories are no longer being updated.
Have a Jim Dandy day!!
