Apple introduced Aperture 1.1.1, which is a maintenance update for the digital image management and editing system, on Thursday. It improves performance and stability, addresses issues with color correction, and improves display compatibility. The update requires Aperture 1.1 and Mac OS X 10.4.6. Aperture 1.1.1 is free to current Aperture users, and is available for download at the Apple Web site.