Hello, I noticed that the package jdk-1.6.0_16-fcs.x86_64.rpm is not signed I solved removing gpgcheck=1 from the sl.repo file which has by default: [sl-base] name=SL 5 base baseurl=http://linuxsoft.cern.ch/scientific/5x/$basearch/SL http://ftp.scientificlinux.org/linux/scientific/5x/$basearch/SL http://ftp1.scientificlinux.org/linux/scientific/5x/$basearch/SL #mirrorlist=ftp://ftp.scientificlinux.org/linux/scientific/mirrorlist/sl-base-5x.txt enabled=1 gpgcheck=1 # To use priorities you must have yum-priorities installed priority=10 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-sl file:///etc/pki/rpm-gpg/RPM-GPG-KEY-sl5 file:///etc/pki/rpm-gpg/RPM-GPG-KEY-csieh file:///etc/pki/rpm-gpg/RPM-GPG-KEY-dawson file:///etc/pki/rpm-gpg/RPM-GPG-KEY-jpolok file:///etc/pki/rpm-gpg/RPM-GPG-KEY-cern file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 Do you know why that package is not signed? I was not getting this error before. Thanks Regards, Gianni Pucciani