Available in Software Update for Aperture users: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.
Alternatively, the download is available from Apple's website.
Article Link: Aperture 1.0.1 Update Available