Hey all, I've been using Aperture 2 now for a couple of weeks with great success. Today, I started having problems. When I have the Inspector pane up, looking at the Adjustments tab, the histogram at the top of the pane shows up, but the histogram in the Levels adjustment area (lower down) shows an empty histogram. If I try to bring up Luminescence, RGB, or the individual color channels, nothing. Any ideas of what's going on? Thanks.