I was installing F 9 from live CD to oldish i386 athlon machine.

My situation is as follows. I have two disks, sda and sdb.  sdb is "new" disk, I
have had sda before that.  For that reason, sda contains several partitions that
used to serve purposes of /boot, swap, and /.  Nowadays I use sda as /boot, swap
and /home, while having / on the "new" disk, sdb.  /home partition is pretty
aged reiserfs, the rest are ext3 partitions (and swap).

What I did when presented with disk layout dialog was that I requested detailed
view (sorry, forgot how is it called exactly).  There I assigned sda1, sda2 and
sda3 respectively to /boot, swap and /home.   I allowed reformatting of sda1,
but not of sda3 (obviously).  It bothers me a bit that anaconda tried to run
reiserfstune even though I asked it not to mess with that partition, but there
could have been legitimate reasons for that.

I assigned sdb solely to / (which is to say that there was single partition sdb1
on that disk), and asked anaconda to reformat it.

Then I hit next, and anaconda thrown the exception.  I tried the whole process
three times total, each time reducing the amount of my tinkering.  In the end I
just didn't use detailed view at all, and just ticked out sda and let anaconda
do its magic.  This worked.

I will attach the two fail logs that anaconda spewed.