There is no reason to have the livecd initrd bring up dmraid sets, therefor I suggest that the dracut options in the isolinux.cfg generated include the rd_NO_DM option.
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
http://git.fedoraproject.org/git/?p=livecd;a=commit;h=0cc8f2021b9650444cab38d316dc909148dfba38
This is in version 032 which will show up in rawhide overnight.