I can no longer get Preview to show my images! Whenever I double-click on an image file, the Preview icon appears on the dock and my CPU utilization jumps to 100% - but the image isn't shown. I would have to kill the Preview process to return CPU utilization to normal levels. Image files may still be viewed as thumbnails under Finder, but when you click on them, Preview says that it's not responding. However, there's no problem whenever I drag images to iPhoto (v5.03). The images are imported, viewed, and edited as usual. How can I get preview to show my images once again? Help!! I'm using OS X 10.3.9 on a 1GHz iBook G4 with 768MB RAM.