I doubt that your bug is the same as this one, since this one only occurred with memory cards, not when attaching a camera.
I still don't see what trouble you're having with Shotwell. When you attach a camera, Shotwell says that it needs to unmount the camera in order to access it; that's normal and expected. If you choose Unmount, can Shotwell read photos from the camera?
Brett,
I doubt that your bug is the same as this one, since this one only occurred with memory cards, not when attaching a camera.
I still don't see what trouble you're having with Shotwell. When you attach a camera, Shotwell says that it needs to unmount the camera in order to access it; that's normal and expected. If you choose Unmount, can Shotwell read photos from the camera?