Aperture 3.0.1
This update improves overall stability and addresses a number of issues in Aperture 3, including:
Upgrading libraries from earlier versions of Aperture
Importing libraries from iPhoto
Importing photos directly from a camera
Memory usage when processing heavily-retouched photos
Face recognition processing
Adding undetected faces using the Add lost Face button
Printing pages containing multiple images
Printing photos and contact sheets with borders and metadata
Editing photos using an external editor
Display
Zooming photos in the Viewer and in the Loupe using keyboard shortcuts
Accessing Aperture libraries on a network volume Selecting and moving pins on the Places map
Adding and editing custom locations using the Manage My Places window
Switching among masters when working with RAW+JPEG pairs.
that update is recommended for all users of Aperture 3.
For detailed knowledge on that update, please visit that website: http://support.apple.com/kb/TS2518
Orginal post by Mike