I have been using screenshots on 10.5.8 for a long time. I have recently run into an issue where the outputs of screenshots do not contain what was selected (e.g., with command-shift-4). As an example, I attach a png output by screenshot of this screen; as you see, it has colors in it but is obviously not what I am seeing. I have tried re-launching Preview, resetting Preview defaults, moving the images to a different location, and rebooting the system. Any ideas?