Dear all, I've two machines. The first has been installed with the 302 version and then upgraded to the 303. The second has been installed with the 303 version. After a yum update/yum clean all/...... as described in https://www.scientificlinux.org/documentation/howto/upgrade in the two machines there are still different versions of several rpms. Why? TIA. Ciao Enrico --- Enrico M. V. Fasanelli - I.N.F.N. Sezione di Lecce