Description of problem:
I have a kickstart file for FC7t1 that was generated from an earlier FC7t1
install, but with an additional small %post section at the end:

%post
echo foo > /root/foo.txt

However, it doesn't appear that the %post section ever gets run.  The 'foo.txt'
file never gets created.

Version-Release number of selected component (if applicable):
FC7 Test 1 install media, 

How reproducible:
Always

Steps to Reproduce:
1. Perform a fresh FC7 install, without using a kickstart file
2. After the install finishes, copy the generated /root/anaconda-ks.cfg to an
appropriate location
3. Add a simple %post section to the end of the kickstart file, such as:
%post
echo foo > /root/foo.txt
4. Install FC7 again, but point the installer at this kickstart file
  
Actual results:
/root/foo.txt is missing

Expected results:
After the installation is finished, the glamorous '/root/foo.txt' file is present.