Description of problem:
During FC6->F7 upgrade, anaconda bootloader installation failed with "array
index out of bounds" (can't recall the exact error message) on line #78 of
/usr/lib/anaconda/iw/upgrade_bootloader_gui.py. Stacktrace suggested that
comments on /etc/modprobe.conf were the cause.
Version-Release number of selected component (if applicable): don't know
How reproducible: only tried it once
Steps to Reproduce:
1. start upgrade process
2. choose language and keyboard
3. choose 'upgrade' instead of 'install'
Dialog with error message and stacktrace.
Successful bootloader installation.
Booting back to FC6 and removing all comments from /etc/modprobe.conf allowed F7
upgrade to proceeed.
*** This bug has been marked as a duplicate of 241991 ***