Apple has released an update for Aperture to version 1.0.1 through the Software Update utility and its web site. The update offers the following changes and improvements:

Aperture 1.0.1 Update addresses a number of issues related to reliability and performance. It also delivers improved image export quality and metadata handling. Among the key areas addressed are:

White balance adjustment accuracy and performance
Image export quality
Book and print ordering reliability
Auto-stacking performance
Custom paper size handling
This update is recommended for all Aperture users.