Description of problem:
After updateing yum\* today, next try of "yum update/install" gives:

Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 236, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 91, in main
    base.getOptionsConfig(args)
  File "/usr/share/yum-cli/cli.py", line 180, in getOptionsConfig
    disabled_plugins=self.optparser._splitArg(opts.disableplugins))
  File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 168, in _getConfig
    startupconf.pluginconfpath,disabled_plugins)
  File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 335, in
doPluginSetup
    plugin_types, confpath, disabled_plugins)
  File "/usr/lib/python2.5/site-packages/yum/plugins.py", line 149, in __init__
    self._importplugins(types)
  File "/usr/lib/python2.5/site-packages/yum/plugins.py", line 191, in
_importplugins
    self._loadplugin(modulefile, types)
  File "/usr/lib/python2.5/site-packages/yum/plugins.py", line 224, in _loadplugin
    module = imp.load_module(modname, fp, pathname, description)
  File "/usr/lib/yum-plugins/changelog.py", line 29, in <module>
    import dateutil.parser
ImportError: No module named dateutil.parser

Disabling yum-changelog plugin helps.

Version-Release number of selected component (if applicable):
yum-changelog-1.1.13-1.fc9.noarch

How reproducible:
Always

Steps to Reproduce:
1. yum update yum-changelog
2. yum update / yum install / yum whatever 
  
Actual results:
Error listed above.