I get a friendly error which says:

"Couldn't find System with id=4"

I can then refresh the page and it is ok. I am gonna send this to QA.

Created attachment 783749 [details]
System Removed

VERIFIED :
# rpm -qa | grep katello
katello-selinux-1.4.4-2.el6sat.noarch
katello-candlepin-cert-key-pair-1.0-1.noarch
katello-certs-tools-1.4.2-2.el6sat.noarch
katello-common-1.4.3-5.el6sam_splice.noarch
katello-configure-1.4.4-2.el6sat.noarch
katello-cli-common-1.4.3-4.el6sat.noarch
katello-glue-elasticsearch-1.4.3-5.el6sam_splice.noarch
katello-headpin-all-1.4.3-5.el6sam_splice.noarch
katello-cli-1.4.3-4.el6sat.noarch
katello-glue-candlepin-1.4.3-5.el6sam_splice.noarch
signo-katello-0.0.10-2.el6sat.noarch
katello-headpin-1.4.3-5.el6sam_splice.noarch


Gets a friendly message : "Couldn't find System with id=3"
Refreshing the page removes the system details from system_list

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHEA-2013-1390.html