SLC4 – announced changes
migration to the 2.6 kernel series
general package update, including gcc-3.4.3, GNOME-2.8, KDE-3.3.1, xorg-x11-6.8.2
Full Kerberos5-aware environment. By default, users should obtain (forwardable?) Kerberos5 credentials on login
integration of several "physics" packages into the default distribution, including ROOT, GEANT4, CERNLIB-2005
But: no changes from your side?