last 3 nightly-composes-education will not boot. "cannot find boot device"

[Thomas C Gilliard]

The last 3 nightly-composes/education fail on boot (In VMworkstation and 
as a dd created SD) education-i386-20090917.16.iso was the last one that 
worked properly.

yesterdays version:

 http://alt.fedoraproject.org/pub/alt/nightly-composes/education/education-i386-20090921.16.iso
fails with message "cannot find boot device" after fedora progress bar.