Installing F11 Rawhide failed during the partition phase giving traceback as shown bellow

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anaconda 11.5.0.59 exception report
Traceback (most recent call first):
  File "/usr/lib/anaconda/iw/partition_gui.py", line 1134, in editPartition
    raise RuntimeError, ("Returning partitions to state "
  File "/usr/lib/anaconda/iw/partition_gui.py", line 1080, in editCB
    self.editPartition(device)
RuntimeError: Returning partitions to state prior to edit failed
=====================

Machine: P510
CPU Type: power5

Steps:
1. Start f11 rawhide installation with vnc
2. Select "Use entire drive" in partitioning. This option should not leave any free space on the disk.
        * Also check for review and modify partitioning layout
        * Pressing next should be able to partition information. 
3. Select one the partition and press 'Edit'
4. Increase the size of the partition and press OK. 
       * This should give an error of saying " not enough free space on disk". Which is expected.
5. Now click on 'OK' for the error. This should generate the above mentioned exception report.

Attaching the anaconda log

This issue is still seen F12 alpha.