This bug is still present :-(. Ubuntu ISOs appear in usb-creator-kde source window OK (afik). Many others do not (debian-live-10.9.0-amd64-kde.iso, devuan_beowulf_3.1.1_amd64_desktop-live.iso, ...).
Launching from the command line and selecting a problem ISO from the GUI gives:
Ubuntu 21.04
This bug is still present :-(. Ubuntu ISOs appear in usb-creator-kde source window OK (afik). Many others do not (debian- live-10. 9.0-amd64- kde.iso, devuan_ beowulf_ 3.1.1_amd64_ desktop- live.iso, ...).
Launching from the command line and selecting a problem ISO from the GUI gives:
isoinfo: Unable to find Joliet SVD