Description of problem: DVD based upgrade of FC7 (from FC6) fails with crash "String index out of range" in anaconda. How reproducible: Hard error. Dump attached. Steps to Reproduce: 1. Just start DVD upgrade. After selecting keyboard etc, anaconda crashes.
Created attachment 156761 [details] Dump file writen to floopy (lucky I had one) during install.
This is caused by blank lines in /etc/modprobe.conf of which anaconda is intollerant. Therefore, the workaround is pretty straightforward.
*** This bug has been marked as a duplicate of 241991 ***