Description of problem:

There are still some possibilities for anaconda to get stuck, this is one of them, and it does not happen always! 

Version-Release number of selected component (if applicable):
F18b TC8

How reproducible:
sometimes

Steps to Reproduce:
0. Use default language and 'accept fate'
1. DO NOT wait for SOFTWARE to finalize setting the INSTALLATION SOURCE & SOFTWARE SELECTION
2. Enter STORAGE: INSTALLATION DESTINATION
3. Select the two disks (one xp, one dynamic disk)
4. Do automatic partitioning, default type (LVM)
5. Set to 'delete' the boot ntfs partition and 'reclaim space'
6. Enter STORAGE: INSTALLATION DESTINATION again
7. Select both disks again and 'continue'
8. <SOMETIMES> anaconda GETs STUCK, with ESC one can DE-STUCK it, but one will not advance past this 'stuck horizon'.
  
Actual results:
sometimes anaconda gets stuck

Expected results:
no stuck

Additional info:
the guest has two disks, one ntfs boot and a dynamic disk. 

other guests do also stuck, but i will report each stuck condition as soon as i can reproduce them more than two times.