I've confirmed that the 64-bit saucy daily build from 2013-09-20 fails to boot with this message:
1. USB HDD: SanDisk has been blocked by the current security policy. [Ok]
Retrying with secure boot disabled allows it to boot without error.
I've confirmed that the 64-bit saucy daily build from 2013-09-20 fails to boot with this message:
1. USB HDD: SanDisk has been blocked by the current security policy.
[Ok]
Retrying with secure boot disabled allows it to boot without error.