Description of problem:
I ran yum-update. (I don't know, but presume, that yum itself was updated.) Many things updated, but not several nvidia packages. Here's what I get when I try yum-update now:

# yum update
Loaded plugins: langpacks, refresh-packagekit
Resolving Dependencies
--> Running transaction check
---> Package kmod-nvidia.x86_64 1:331.67-2.fc20.5 will be updated
---> Package kmod-nvidia.x86_64 1:331.79-1.fc20.3 will be an update
--> Processing Dependency: kmod-nvidia-3.14.7-200.fc20.x86_64 >= 1:331.79-1.fc20.3 for package: 1:kmod-nvidia-331.79-1.fc20.3.x86_64
---> Package kmod-nvidia-3.14.4-200.fc20.x86_64.x86_64 1:331.67-2.fc20.5 will be updated
---> Package kmod-nvidia-3.14.4-200.fc20.x86_64.x86_64 1:331.79-1.fc20 will be an update
---> Package xorg-x11-drv-nvidia.x86_64 1:331.67-1.fc20 will be updated
---> Package xorg-x11-drv-nvidia.x86_64 1:331.79-2.fc20 will be an update
---> Package xorg-x11-drv-nvidia-libs.x86_64 1:331.67-1.fc20 will be updated
---> Package xorg-x11-drv-nvidia-libs.x86_64 1:331.79-2.fc20 will be an update
--> Running transaction check
---> Package kmod-nvidia-3.14.7-200.fc20.x86_64.x86_64 1:331.79-1.fc20.3 will be installed
--> Processing Dependency: kernel-uname-r = 3.14.7-200.fc20.x86_64 for package: 1:kmod-nvidia-3.14.7-200.fc20.x86_64-331.79-1.fc20.3.x86_64
Traceback (most recent call last):
  File "/bin/yum", line 29, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 367, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 229, in main
    (result, resultmsgs) = base.buildTransaction() 
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1201, in buildTransaction
    (rescode, restring) = self.resolveDeps()
  File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 915, in resolveDeps
    for po, dep in self._checkFileRequires():
  File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 1206, in _checkFileRequires
    self.installedFileProviders = self.rpmdb.fileRequiresData()
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 970, in fileRequiresData
    for name, flag, evr in pkg.requires:
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 678, in <lambda>
    requires = property(fget=lambda self: self.returnPrco('requires'))
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1411, in returnPrco
    self._populatePrco()
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1489, in _populatePrco
    (name, flag, vers) = self._filter_deps(name, hdr[oldtagf], hdr[oldtagv], andmask, resmask)
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1422, in _filter_deps
    for (n, f, v) in zip(name, flag, vers):
TypeError: zip argument #2 must support iteration

Version-Release number of selected component:
yum-utils-1.1.31-23.fc20

Additional info:
reporter:       libreport-2.2.2
cmdline:        /usr/bin/python /bin/package-cleanup --cleandupes
dso_list:       yum-3.4.3-148.fc20.noarch
executable:     /bin/package-cleanup
kernel:         3.14.4-200.fc20.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
packages.py:1422:_filter_deps:TypeError: zip argument #2 must support iteration

Traceback (most recent call last):
  File "/bin/package-cleanup", line 400, in <module>
    util = PackageCleanup()
  File "/bin/package-cleanup", line 60, in __init__
    self.main()
  File "/bin/package-cleanup", line 376, in main
    self._remove_old_dupes()
  File "/bin/package-cleanup", line 177, in _remove_old_dupes
    dupedict = self._find_installed_duplicates()
  File "/bin/package-cleanup", line 135, in _find_installed_duplicates
    if 'kernel' in pkg.provides_names:
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 685, in <lambda>
    provides_names = property(fget=lambda self: self.returnPrcoNames('provides'))
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 658, in returnPrcoNames
    data = [n for (n, f, v) in self.returnPrco(prcotype)]
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1411, in returnPrco
    self._populatePrco()
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1489, in _populatePrco
    (name, flag, vers) = self._filter_deps(name, hdr[oldtagf], hdr[oldtagv], andmask, resmask)
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1422, in _filter_deps
    for (n, f, v) in zip(name, flag, vers):
TypeError: zip argument #2 must support iteration

Local variables in innermost frame:
vers: ''
name: 'libreoffice'
newname: []
self: <RPMInstalledPackage : libreoffice-templates-presentation-layouts-3.3-10.4.noarch (0x1f11910)>
newvers: []
andmask: 134217728
flag: 134742016L
newflag: []
resmask: 134217728