I tried to search for "wine" in the package manager and it gave me this error:

Error Type: <class 'yum.Errors.RepoError'>
Error Value: Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again
  File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 2098, in <module>
    main()
  File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 2095, in main
    backend.dispatcher(sys.argv[1:])
  File : /usr/lib/python2.5/site-packages/packagekit/backend.py, line 599, in dispatcher
    self.dispatch_command(args[0], args[1:])
  File : /usr/lib/python2.5/site-packages/packagekit/backend.py, line 566, in dispatch_command
    self.search_name(options, searchterms)
  File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 333, in search_name
    self._do_search(searchlist, filters, key)
  File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 304, in _do_search
    for (pkg, inst) in res:
  File : /usr/lib/python2.5/site-packages/yum/__init__.py, line 1593, in searchGenerator
    for sack in self.pkgSack.sacks.values():
  File : /usr/lib/python2.5/site-packages/yum/__init__.py, line 591, in <lambda>
    pkgSack = property(fget=lambda self: self._getSacks(),
  File : /usr/lib/python2.5/site-packages/yum/__init__.py, line 434, in _getSacks
    self.repos.populateSack(which=repos)
  File : /usr/lib/python2.5/site-packages/yum/repos.py, line 251, in populateSack
    sack.populate(repo, mdtype, callback, cacheonly)
  File : /usr/lib/python2.5/site-packages/yum/yumRepo.py, line 160, in populate
    if self._check_db_version(repo, mydbtype):
  File : /usr/lib/python2.5/site-packages/yum/yumRepo.py, line 217, in _check_db_version
    return repo._check_db_version(mdtype)
  File : /usr/lib/python2.5/site-packages/yum/yumRepo.py, line 1083, in _check_db_version
    repoXML = self.repoXML
  File : /usr/lib/python2.5/site-packages/yum/yumRepo.py, line 1241, in <lambda>
    repoXML = property(fget=lambda self: self._getRepoXML(),
  File : /usr/lib/python2.5/site-packages/yum/yumRepo.py, line 1237, in