Fedora 12 alpha bogue

Bonjour,

J'aimerais savoir comment on fait pour reporter un bogue dans Fedora 12 Alpha.
Merci.

Le voici :

Traceback (most recent call last):
File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 358, in _do_search
for (pkg, inst) in res:
File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 1903, in searchGenerator
for sack in self.pkgSack.sacks.values():
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 1220, in _check_db_version
repoXML = self.repoXML
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1384, in <lambda>
repoXML = property(fget=lambda self: self._getRepoXML(),
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1376, in _getRepoXML
self._loadRepoXML(text=self)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1366, in _loadRepoXML
return self._groupLoadRepoXML(text, ["primary"])
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1349, in _groupLoadRepoXML
if self._commonLoadRepoXML(text):
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1195, in _commonLoadRepoXML
result = self._getFileRepoXML(local, text)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 976, in _getFileRepoXML
cache=self.http_caching == 'all')
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 754, in _getFile
result = self.mediafunc(local = local, checkfunc = checkfunc, relative = relative, text = text, copy_local = copy_local, url = url, mediaid = self.mediaid, name = self.name, discnum = discnum, range = (start, end))
File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 2863, in MediaGrabber
manager = MediaManager()
File "/usr/share/PackageKit/helpers/yum/yumMediaManager.py", line 101, in __init__
raise NotImplemented
TypeError: exceptions must be classes or instances, not NotImplementedType