Apple release Aperture 1.5.3 update for owners of any previous licensed version of the software.

Recommended for all licensed Aperture customers, Aperture 1.5.3 improves overall reliability and performance in a number of areas, including the generation of thumbnails for adjusted images, entering and exiting Full Screen mode, working with large sets of keyword in the keywords HUD, and restoring from a vault.

To download the update, visit: http://www.apple.com/support/downloads/aperture153update.html