The following error appeared and I'm wondering if it's important enough to file a bug report: /var/tmp/rpm-tmp.8817: line 2: gdk-pixbuf-query-loaders: command not found error: %postun(librsvg2-2.2.3-2) scriptlet failed, exit status 127 Also /etc/sysconfig/rhn/rhn-applet.rpmnew got created; the difference is that the uuid has changed from a hex key to "UNSPECIFIED". I don't recall where that hex key came from -- was it in a previous CentOS release, or could it have come from an RHN signup at some other time?