error updating F12

[dave perry]

Starting yesterday, I get the following error when I accept "install all 
updates":

Error Type: <class 'yum.Errors.RepoError'>
Error Value: Error getting repository data for installed, repository not 
found
   File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 3125, in 
<module>
     main()
   File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 3122, in 
main
     backend.dispatcher(sys.argv[1:])
   File : /usr/lib/python2.6/site-packages/packagekit/backend.py, line 
710, in dispatcher
     self.dispatch_command(args[0], args[1:])
   File : /usr/lib/python2.6/site-packages/packagekit/backend.py, line 
657, in dispatch_command
     self.update_packages(only_trusted, package_ids)
   File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 1948, in 
update_packages
     signed = self._is_package_repo_signed(pkg)
   File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 1437, in 
_is_package_repo_signed
     repo = self.yumbase.repos.getRepo(pkg.repoid)
   File : /usr/lib/python2.6/site-packages/yum/repos.py, line 121, in 
getRepo
     'Error getting repository data for $s, repository not found' $ (repoid)

Regards,
Dave Perry