Description of problem:
I was trying to install Fedora 20 using the full distro image on a USB stick. I have several disks that needed to be configured in a particular way and after doing a custom configuration it failed. I tried it twice.

Version-Release number of selected component:
anaconda-20.25.15-1

The following was filed automatically by anaconda:
anaconda 20.25.15-1 exception report
Traceback (most recent call first):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 681, in apply
    self.storage.setFstabSwaps(new_swaps)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 125, in _runSpoke
    action.apply()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 424, in _on_spoke_clicked
    self._runSpoke(spoke)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 442, in _on_spoke_clicked
    self._on_spoke_clicked(self._spokes[dest].selector, None, self._spokes[dest])
AttributeError: 'Blivet' object has no attribute 'setFstabSwaps'

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   initrd=initrd.img inst.stage2=hd:LABEL=FEDORA quiet inst.updates=http://dlehman.fedorapeople.org/updates/updates-980267.0.img BOOT_IMAGE=vmlinuz 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.11.10-301.fc20.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        20