strange problem with LAN

[Bengt Lindholm]

We use only hosts-files, not dhcp at all (arpwatch is running) and have
the same problem. The problem started after last update:

Apr 10 10:06:25 Updated: samba-common.i386 3.0.24-4.fc6
Apr 10 10:06:25 Updated: libmodplug.i386 1:0.8.4-1.fc6
Apr 10 10:06:27 Updated: yum.noarch 3.0.5-2.fc6
Apr 10 10:06:31 Updated: selinux-policy.noarch 2.4.6-49.fc6
Apr 10 10:06:32 Updated: brlapi.i386 0.4.1-2.1.fc6
Apr 10 10:06:32 Updated: libXfont.i386 1.2.8-1.fc6
Apr 10 10:06:36 Updated: ImageMagick.i386 6.2.8.0-4.fc6
Apr 10 10:06:38 Updated: samba-client.i386 3.0.24-4.fc6
Apr 10 10:06:46 Updated: selinux-policy-targeted.noarch 2.4.6-49.fc6
Apr 10 10:06:46 Updated: iputils.i386 20070202-2.fc6
Apr 10 10:06:46 Updated: yum-updatesd.noarch 3.0.5-2.fc6
Apr 10 10:06:52 Updated: samba.i386 3.0.24-4.fc6
Apr 10 10:06:52 Updated: dhclient.i386 12:3.0.5-4.fc6

Something to do with selinux* ?

Bengt