I was able to fix this for myself following instructions here:
https://help.ubuntu.com/community/USB%20Installation%20Media
UNetbootin (Windows or Linux)
UNetbootin automates this task by providing a GUI to create a bootable
Ubuntu Live USB drive from an ISO file, and can be run from both an
installed Windows or Linux system, or from a liveCD.
Optional: If you need to activate the original Ubuntu livecd boot menu,
for example if you want to disable the framebuffer or read the Ubuntu
livecd HELP screens and cheatcodes, please make these changes to your
USB drive after your UNetbootin installation is completed:
1) Delete the SYSLINUX.CFG file or rename it to be SYSLINUX.OLD
2) Enter the ISOLINUX folder and rename the ISOLINUX.CFG file to be
SYSLINUX.CFG. You may or may not need to rename ISOLINUX.BIN to
SYSLINUX.BIN, but it won't hurt.
3) Move up to the top level and rename the ISOLINUX folder to be
SYSLINUX
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1241589
Title:
ubuntu 13.10 unable to boot on live usb (busy box - initramfs)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1241589/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs