Description of problem:
When trying to boot the current boot.iso I get python backtrace.

Version-Release number of selected component (if applicable):
anaconda-11.2.0.60-1

How reproducible:
every time

Steps to Reproduce:
1. boot boot.iso via net
  
Actual results:
[transposing by hand]
:
:
  File "/usr/lib/python2.5/site-packages/urlgrabber.py", in line 377, in <module>
    import urllib2
  File "/usr/lib/python2.5/urllib2.py", line 88, in <module>
    import hashlib
:
  File "/usr/lib/python2.5/hashlib.py", line 34, in __get_builtin_constructor
    import _sha256
ImportError: No module named _sha256
:
:
you may safely reboot your system

Expected results:
no backtrace

Additional info:
Also happens when booting into rescue mode.