That is what I get during install just after anaconda formatted the swap 
space :

Traceback (innermost last):
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/iw/progress_gui.py", 
line 20, in run
    rc = self.todo.doInstall ()
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/todo.py", line 1472, in 
doInstall
    self.fstab.mountFilesystems (self.instPath)
  File "fstab.py", line 715, in mountFilesystems
    raise SystemError, (errno, msg)
SystemError: (22, 'Param?tre invalide')

Local variables in innermost frame:
size: 2048728
fsystem: ext2
self: <fstab.GuiFstab instance at 84e6a00>
msg: Param?tre invalide
doFormat: 0
errno: 22
device: hda5
instPath: /mnt/sysimage
mntpoint: /usr

ToDo object:
(itodo
ToDo
p1
(dp2
S'method'
p3
(iimage
CdromInstallMethod
p4
(dp5
S'progressWindow'
p6

<failed>