Actually I see that half of the screenshots *were* lost (unless they were saved to some other random location that I have no way of knowing). So half of the time gnome-screenshot actually was not working (which could be partially expected during an upgrade while some of the system has been upgraded and some hasn't - but then I should have been shown a error message), and half of the time it was silently saving the screenshots to the default directory; and I couldn't even tell the difference. Unbelievable.
Actually I see that half of the screenshots *were* lost (unless they were saved to some other random location that I have no way of knowing). So half of the time gnome-screenshot actually was not working (which could be partially expected during an upgrade while some of the system has been upgraded and some hasn't - but then I should have been shown a error message), and half of the time it was silently saving the screenshots to the default directory; and I couldn't even tell the difference. Unbelievable.