This appears to be a problem with Syslinux, not USB Creator, as I had the same problem, downgraded USB Creator, and the problem didn't go away.
** Package changed: usb-creator (Ubuntu) => syslinux (Ubuntu) -- [maverick] live USB created usb-creator-gtk won't boot https://bugs.launchpad.net/bugs/617779 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