Comment 2 for bug 304259

I'd like to see this too. It's a bit silly to require an .iso file matching the running system when the very same files are available under /cdrom. (Keep the option to install different versions of Ubuntu, of course, and do require an .iso file then.)

Usb-creator should probably verify MD5 sums in this case, as I've definitely seen minor file corruption (which can lead to boot failures) with some flash drives. But for ~700MB of freed-up space, it's worth it.

An old patch by "probono," in a bug report marked as a duplicate of this one, may be worth a look:

    https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/287684/comments/2