You could get the source and try, but I'm not really sure exactly how and am out of ideas to diagnose it further at this point. Maybe Colin has some ideas?
** Changed in: grub2 (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1245147 Title: Ubuntu 13.10 does not boot from USB stick 3.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1245147/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs