I ran into this issue as well but through a specific route: I just tried to select the image while it was trying to erase the disk. That somehow canceled the erasing, according to startup-disk-creator, but left it in the inconsistent state described here.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1048792 Title: org.freedesktop.Dbus error while trying to erase USB key with Startup disk creator To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1048792/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs