Apple has released an upgrade to Aperture 3. It is a free download at the App store if you're already an Aperture 3 owner. First upgrade your Mac OS to OS 10.6.7 From the App store icon in your Dock, you will see the red # 1 indicating you have an application update available. You can read the article here on Softpedia: Apple Launches Aperture 3.1.2 - Free Download - Softpedia Among other things the update addresses the following: Fixed issues listed under ‘Library’ include that preventing referenced images from being reconnected, and Aperture quitting unexpectedly when switching libraries. ‘Adjustments’ fixes have been made by resolving issues with Macs becoming unresponsive when using brushes, issues that could cause Aperture to quit unexpectedly when using Retouch, and one bug that could cause the white balance value for certain RAW images to be displayed incorrectly. Finally, Apple lists ‘other’ fixes. These include: - Fixes an issue that could cause Aperture to quit unexpectedly when panning a zoomed image. - Addresses compatibility of exported XMP Sidecar files with third-party applications. - Resolves an issue that could cause Aperture to quit unexpectedly when using Align to Beats in a slideshow.