I can't select a fedora image to create a bootable usb stick. It works with ubutu and gnome ubuntu but not with fedora. Does the ubuntu startup creator only work with ubuntu isos?
Have you tried another app to do it? UNetBootIn is a good one (and does not require any installation, just download, unpack, launch and go). I remember the same issue when I'm tried to create a Live USB with a non-Ubuntu distro.