I'm using a fresh install of Fedora 17 beta RC4 i686 on a bare metal machine using a 2 disk RAID1 device through dmraid and a promise RAID controller.
When I attempt to shut the machine down, it attempts to detach the dm devices before giving up and attempting to move on.
Just after giving up, I see the following error message:
shutdown: line 11: /lib/dracut-lib.sh: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
panic occurred, switching back to text console
I'm still gathering data on what exactly is going on here. Will update the bug as I learn more.