Running restorecon on anything produces the following error:
# restorecon -R -v /
/etc/selinux/targeted/contexts/files/file_contexts: Multiple same specifications for /opt/Adobe(/.*?)/nppdf\.so.

There is nothing installed in /opt. This seems a bug in the policy file itself, last
updated (grep targeted yum.log):
Dec 08 04:11:11 Updated: selinux-policy-targeted - 2.6.4-59.fc7.noarch

(But I haven't used restorecon in a while, so I don't know when
the error appeared.)

Fedora 7, up to date system.