Comment 5 for bug 1208129

I experienced this on 13.04. I then downloaded the source package for usb-creator_0.2.47.2 (in raring updates repository) and ran usbcreator-gtk from inside Eclipse. I could not reproduce the error in 3 attempts with various iso images and physical drives.

So if you are a user reading this, it might not be fixed because it is hard to reproduce.

I think in addition to printing the given error message, the app should also print the python trace. That wouldn't be any uglier to users, and might make it easier to track down the cause.