"yum -yq --security check-update" spouting lots of text?

[David Burns <tdbtdb@xxxxxxxxx>]

I thought -q meant 'no output'. Recently yum -q has started spewing the following garbage, can anyone tell me why?
thanks,
Dave

[uname -a
Linux  2.6.18-194.17.4.el5.centos.plus #1 SMP Tue Oct 26 04:07:11 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux]


# yum -yq --security check-update 2>/dev/null
Loaded plugins: fastestmirror, priorities, security
Loading mirror speeds from cached hostfile
 * addons: mirror.5ninesolutions.com
 * base: ftp.osuosl.org
 * centosplus: centos.promopeddler.com
 * contrib: mirrors.kernel.org
 * epel: mirror.pnl.gov
 * extras: mirror.rocketinternet.net
 * rpmforge: ftp-stud.fht-esslingen.de
 * rpmfusion-free-updates: mirror.web-ster.com
 * rpmfusion-free-updates-testing: mirror.web-ster.com
 * rpmfusion-nonfree-updates: mirror.web-ster.com
 * rpmfusion-nonfree-updates-testing: mirror.web-ster.com
 * updates: mirrors.cat.pdx.edu
Limiting package lists to security relevant ones
No packages needed, for security, 31 available

aalib.x86_64                                                                    1.4.0-5.el5.rf                                                      rpmforge
blas.x86_64                                                                     3.1.1-1.el5.rf                                                      rpmforge
cadaver.x86_64                                                                  0.22.5-1.el5.rf                                                     rpmforge
dnsmasq.x86_64                                                                  2.55-1.el5.rf                                                       rpmforge
emacs-git.x86_64                                                                1.7.3-1.el5.rf                                                      rpmforge
enca.x86_64                                                                     1.10-1.el5.rf                                                       rpmforge
gdal.x86_64                                                                     1.4.4-2.el5.rf                                                      rpmforge
geos.x86_64                                                                     3.2.2-1.el5.rf                                                      rpmforge
git.x86_64                                                                      1.7.3-1.el5.rf                                                      rpmforge
hdf5.x86_64                                                                     1.8.0-1.el5.rf                                                      rpmforge
iso-codes.noarch                                                                1.0a-1.el5.rf                                                       rpmforge
lapack.x86_64                                                                   3.1.1-1.el5.rf                                                      rpmforge
lftp.x86_64                                                                     4.0.10-1.el5.rf                                                     rpmforge
libextractor.x86_64                                                             0.5.22-2.el5.rf                                                     rpmforge
libmpcdec.x86_64                                                                1.2.6-1.el5.rf                                                      rpmforge
libpaper.x86_64                                                                 1.1.22-1.el5.rf                                                     rpmforge
libwpd.x86_64                                                                   0.8.14-1.el5.rf                                                     rpmforge
mtr.x86_64                                                                      2:0.80-1.el5.rf                                                     rpmforge
netcdf.x86_64                                                                   3.6.3-1.el5.rf                                                      rpmforge
netcdf-devel.x86_64                                                             3.6.3-1.el5.rf                                                      rpmforge
perl-Compress-Zlib.noarch                                                       2.015-1.el5.rf                                                      rpmforge
perl-DBI.x86_64                                                                 1.615-1.el5.rf                                                      rpmforge
perl-Git.x86_64                                                                 1.7.3-1.el5.rf                                                      rpmforge
perl-HTML-Parser.x86_64                                                         3.68-1.el5.rf                                                       rpmforge
perl-HTML-Tagset.noarch                                                         3.20-1.el5.rf                                                       rpmforge
proj.x86_64                                                                     4.7.0-1.el5.rf                                                      rpmforge
rsync.x86_64                                                                    3.0.7-1.el5.rf                                                      rpmforge
syslinux.x86_64                                                                 4.03-1.el5.rf                                                       rpmforge
udftools.x86_64                                                                 1.0.0b3-3.el5.rf                                                    rpmforge
xvidcore.x86_64                                                                 1.2.2-1.el5.rf                                                      rpmforge
Obsoleting Packages
perl-IO-Compress.noarch                                                         2.030-2.el5.rf                                                      dag     
    perl-Compress-Zlib.x86_64                                                   1.42-1.fc6                                                          installed

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