The following was filed automatically by anaconda:
anaconda 15.28 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/formats/__init__.py", line 419, in majorminor
    dev = udev_get_device(sysfs_path[4:])
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/formats/__init__.py", line 270, in cacheMajorminor
    return self.majorminor # this does the caching
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devices.py", line 700, in _preTeardown
    self.format.cacheMajorminor()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devices.py", line 3374, in _preTeardown
    return StorageDevice._preTeardown(self, recursive=recursive)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/devices.py", line 714, in teardown
    if not self._preTeardown(recursive=recursive):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/__init__.py", line 2074, in umountFilesystems
    device.teardown()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/storage/__init__.py", line 1211, in umountFilesystems
    self.fsset.umountFilesystems(ignoreErrors=ignoreErrors, swapoff=swapoff)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/livecd.py", line 137, in doPreInstall
    anaconda.storage.umountFilesystems(swapoff = False)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/backend.py", line 202, in doPreInstall
    anaconda.backend.doPreInstall(anaconda)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/dispatch.py", line 211, in moveStep
    rc = stepFunc(self.anaconda)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/dispatch.py", line 130, in gotoNext
    self.moveStep()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/gui.py", line 1257, in nextClicked
    self.anaconda.dispatch.gotoNext()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/iw/progress_gui.py", line 79, in renderCallback
    self.intf.icw.nextClicked()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/gui.py", line 1278, in handleRenderCallback
    self.currentWindow.renderCallback()
TypeError: 'NoneType' object is not subscriptable