Shotwell is getting more annoying all the time. For example: it assumes you're importing from a pure camera, so if you plug in, say, a smartphone, it offers to import every single image on the device. Including your web browser cache. That's helpful.
But the latest: It strips out timezone data?!?! I uploaded a whole batch of eclipse photos dated tomorrow. At least Flickr lets me fix it with two clicks for the whole set.