Today my ISP was doing some repair on their network structure. During the day when the connection to the internet was not available (while local network worked), I got every hour or so a bit annoying window with a message about unrecoverable error. This trace was attached:

Traceback (most recent call last):
  File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 2151, in get_updates
    ygl = self.yumbase.doPackageLists(pkgnarrow='updates')
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 1733, in doPackageLists
    for (n,a,e,v,r) in self.up.getUpdatesList():
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 715, in <lambda>
    up = property(fget=lambda self: self._getUpdates(),
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 595, in _getUpdates
    self._up = rpmUtils.updates.Updates(self.rpmdb.simplePkgList(), self.pkgSack.simplePkgList())
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 702, in <lambda>
    pkgSack = property(fget=lambda self: self._getSacks(),
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 538, in _getSacks
    self.repos.populateSack(which=repos)
  File "/usr/lib/python2.6/site-packages/yum/repos.py", line 277, in populateSack
    sack.populate(repo, mdtype, callback, cacheonly)
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 164, in populate
    if self._check_db_version(repo, mydbtype):
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 222, in _check_db_version
    return repo._check_db_version(mdtype)
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1222, in _check_db_version
    repoXML = self.repoXML
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1386, in <lambda>
    repoXML = property(fget=lambda self: self._getRepoXML(),
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1378, in _getRepoXML
    self._loadRepoXML(text=self)
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1368, in _loadRepoXML
    return self._groupLoadRepoXML(text, ["primary"])
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1351, in _groupLoadRepoXML
    if self._commonLoadRepoXML(text):
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1192, in _commonLoadRepoXML
    if self._latestRepoXML(local):
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1170, in _latestRepoXML
    repomd = self.metalink_data.repomd
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 699, in <lambda>
    metalink_data = property(fget=lambda self: self._getMetalink(),
  File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 681, in _getMetalink
    print "Could not get metalink $s error was \n$s" $(url, e)
  File "/usr/lib64/python2.6/codecs.py", line 351, in write
    data, consumed = self.encode(object, self.errors)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc4 in position 151: ordinal not in range(128)