While doing a network rawhide install from a local (100 Mbit) mirror using boot.iso and install.img dated 2008-09-10, I noticed that: _netdev does no get added to the fstab entry for an iscsi partition, causing rc.sysinit to try and fsck it long before it is available and dropping you in a repair shell because the fsck surprisingly (not) fails.
I've got a fix for this, I'll send the patch to the mailinglist (no git access yet, this is being worked on) reassigning to me.
I've commited the fix to git now, this will get picked up in the next anaconda rawhide build, closing.