[root@ns23862 ~]# yum update
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
Reading repository metadata in from local files
Excluding Packages in global exclude list
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in ?
    yummain.main(sys.argv[1:])
  File "/usr/share/yum-cli/yummain.py", line 94, in main
    result, resultmsgs = base.doCommands()
  File "/usr/share/yum-cli/cli.py", line 356, in doCommands
    return self.yum_cli_commands[self.basecmd].doCommand(self, self.basecmd, self.extcmds)
  File "/usr/share/yum-cli/yumcommands.py", line 150, in doCommand
    return base.updatePkgs(extcmds)
  File "/usr/share/yum-cli/cli.py", line 631, in updatePkgs
    self.doRepoSetup()
  File "/usr/share/yum-cli/cli.py", line 108, in doRepoSetup
    self.doSackSetup(thisrepo=thisrepo)
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 333, in doSackSetup
    self.excludePackages()
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 487, in excludePackages
    exactmatch, matched, unmatched = \
  File "/usr/lib/python2.4/site-packages/yum/packages.py", line 94, in parsePackages
    if regex.match(item):
TypeError: expected string or buffer