Fedora 18, 56 Errata Skipped

[root@spacewalk ~]# cat /var/log/rhn/reposync/fedora18-x86-64-2013.04.16-02\:42\:00.log

Sync started: Tue Apr 16 02:42:00 2013
['/usr/bin/spacewalk-repo-sync', '--channel', 'fedora18-x86-64', '--type', 'yum']
Repo URL: ftp://mirror.cs.princeton.edu/pub/mirrors/fedora/linux/releases/18/Everything/x86_64/os/
Packages in repo:             33868
No new packages to sync.
Repo ftp://mirror.cs.princeton.edu/pub/mirrors/fedora/linux/releases/18/Everything/x86_64/os/ has comps file comps.xml.
Repo ftp://mirror.cs.princeton.edu/pub/mirrors/fedora/linux/releases/18/Everything/x86_64/os/ has 0 errata.
Repo URL: ftp://mirror.cs.princeton.edu/pub/mirrors/fedora/linux/updates/18/x86_64/
Packages in repo:             13084
No new packages to sync.
Repo ftp://mirror.cs.princeton.edu/pub/mirrors/fedora/linux/updates/18/x86_64/ has comps file comps.xml.
Repo ftp://mirror.cs.princeton.edu/pub/mirrors/fedora/linux/updates/18/x86_64/ has 1974 errata.
56 errata skipped because of empty package list.
Sync completed.
Total time: 0:59:42