Description of problem:

Right after media test, anaconda fails with:

Traceback (most recent call last):
File "/usr/bin/anaconda", line 613, in ?
  in iutil.writeRpmPlatform()
File "/usr/lib/anaconda/iutil.py", line 402, in writeRpmPlatform
  if flags["targetarch"] != None:
File "/usr/lib/anaconda/flags.py", line 25 in __getattr__
  raise AttributeError, attr
AttributeError: __getitem__
install exited abnormally [1/1]
  

Version-Release number of selected component (if applicable):
RHEL5-Client-20060921.0-i386-disc1-ftp.iso

How reproducible:
Always

Steps to Reproduce:
1. Insert CD#1
2. Hit enter at the prompt
3.
  
Actual results:
installer crashes

Expected results:
installation should continue

Additional info:
Happens in both 32 and 64 bits, in both 945 and 965 chipsets (haven't tested
more chipsets yet)