Due to changes in syslinux, it is not currently possible to use usb-creator from 14.04 and earlier releases to write USB images for 14.10; we believe that it is also not possible to use usb-creator from a 14.10 system to write USB images for earlier releases. For now the workaround is to use a matching release of Ubuntu to write the images, but we intend to issue updates soon to work around this incompatibility.
@PHLin /bugs.launchpad .net/ubuntu/ +source/ usb-creator/ +bug/1325801
It could be related to this known bug: https:/
According to 14.10 release notes (https:/ /wiki.ubuntu. com/UtopicUnico rn/ReleaseNotes #Boot.2C_ installation_ and_post- install):
Due to changes in syslinux, it is not currently possible to use usb-creator from 14.04 and earlier releases to write USB images for 14.10; we believe that it is also not possible to use usb-creator from a 14.10 system to write USB images for earlier releases. For now the workaround is to use a matching release of Ubuntu to write the images, but we intend to issue updates soon to work around this incompatibility.