My apologies if it is a wrong list to post to. Rex, I installed scientific linux on my laptop and decided to upgrade kde with sudo yum --enablerepo=kde --enablerepo=kde-all update and 1 out 36 packages has problem: http://apt.kde-redhat.org/apt/kde-redhat/sl/4.4/x86_64/stable/RPMS/nas-1.8-10.el4.x86_64.rpm: [Errno -1] Package does not match checksum Is it a temporary glitch and I should try it again after some time or it is a problem with your repo? For my next attempt do I need to clean yum cache? Is it possible to clean it for 1 package only? If yes, how to? Thanks, Alex