Description of problem: after installing of yum-warm-cache comes the Error

"Traceback (most recent call last):
  File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 2461, in _check_init
    self.yumbase.repos.doSetup()
  File "/usr/lib/python2.6/site-packages/yum/repos.py", line 79, in doSetup
    self.ayum.plugins.run('postreposetup')
  File "/usr/lib/python2.6/site-packages/yum/plugins.py", line 179, in run
    func(conduitcls(self, self.base, conf, **kwargs))
  File "/usr/lib/yum-plugins/rpm-warm-cache.py", line 32, in postreposetup_hook
    cmd = commands[0]
TypeError: 'NoneType' object is unsubscriptable"

If I uninstall the package, the error is lost. If I install it again the Error appears new.


Version-Release number of selected component (if applicable):

yum-3.2.22-4.fc11.noarch  

other yum comonents and plugins are:

yum-plugin-tmprepo-1.1.21-2.fc11.noarch
anaconda-yum-plugins-1.0-4.fc11.noarch
yum-plugin-protect-packages-1.1.21-2.fc11.noarch
yum-presto-0.4.5-4.fc11.noarch
yum-3.2.22-4.fc11.noarch
yum-plugin-protectbase-1.1.21-2.fc11.noarch
yum-NetworkManager-dispatcher-1.1.21-2.fc11.noarch
yum-plugin-rpm-warm-cache-1.1.21-2.fc11.noarch
yum-plugin-kmdl-0.8-11.fc10.noarch
yum-plugin-refresh-updatesd-1.1.21-2.fc11.noarch
PackageKit-yum-plugin-0.4.6-8.fc11.i586
yum-plugin-versionlock-1.1.21-2.fc11.noarch
yum-plugin-fastestmirror-1.1.21-2.fc11.noarch
PackageKit-yum-0.4.6-8.fc11.i586
yum-plugin-remove-with-leaves-1.1.21-2.fc11.noarch
yum-plugin-upgrade-helper-1.1.21-2.fc11.noarch
yum-metadata-parser-1.1.2-12.fc11.i586
yum-utils-1.1.21-2.fc11.noarch
yum-updatesd-0.9-2.fc11.noarch
yum-plugin-allowdowngrade-1.1.21-2.fc11.noarch
yum-plugin-keys-1.1.21-2.fc11.noarch
yumex-2.0.5-6.fc11.noarch


How reproducible:
always

Steps to Reproduce:
1. install yum-plugin-rpm-warm-cache
2. de- and reinstall the package
3. yum update
  
Actual results:


Expected results:


Additional info: Others in the German forum have no Mistake with this install