Reverting revision 611 fixes it for me. With 611 I get errors about "head: not found". If I remove the "head -n1" from revision 611, I get the 'mount' error in the attached casper.log file.
** Attachment added: "casper.log" http://launchpadlibrarian.net/25691839/casper.log -- casper USB media fails to boot: USB storage device not detected, drops to (initramfs) prompt https://bugs.launchpad.net/bugs/363038 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs