Description of problem:
Here is what i did:
followed the install till "Install Destination"
=>local standard disks => selected my harddrive => i'll configure partitioning and pressed "done" => selected "/", "/home" and "swap" partitioning and selected everywhere "Reformat" => clicked ok.

Version-Release number of selected component:
anaconda-core-21.48.6-1.fc21.x86_64

The following was filed automatically by anaconda:
anaconda 21.48.6-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 1040, in _setFormat
    raise errors.DeviceError("cannot replace active format", self.name)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 1600, in _setFormat
    StorageDevice._setFormat(self, fmt)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 1049, in <lambda>
    lambda d,f: d._setFormat(f),
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 810, in _do_reformat
    device.format = old_format
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 122, in decorated
    return func(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1150, in _save_right_side
    encrypted, selector, fs_type)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1491, in on_back_clicked
    self._save_right_side(self._current_selector)
DeviceError: ('cannot replace active format', 'sda5')

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-base
cmdline_file:   initrd=initrd0.img root=live:CDLABEL=LIVE rootfstype=vfat ro rd.live.image quiet  rhgb rd.luks=0 rd.md=0 rd.dm=0  BOOT_IMAGE=vmlinuz0 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.16.1-301.fc21.x86_64
other involved packages: python-blivet-0.62-1.fc21.noarch, anaconda-gui-21.48.6-1.fc21.x86_64
product:        Fedora
release:        Fedora release 21 (Twenty One)
type:           anaconda
version:        21