The new update is the second in just over two weeks, following the initial release of iLife 11 on October 20, and a 9.0.1 update hastily released to solve a problem causing data loss for some users upgrading from iPhoto '09.
Apple's release notes for the update state:
This update adds several new print product options to iPhoto '11. It also improves overall stability and addresses a number of other minor issues.
- Provides the ability to create and order calendars in iPhoto.
- Additional letterpress holiday greeting card themes are now available.
- Fixes an issue that prevented videos downloaded from MobileMe or Flickr from importing correctly into iPhoto events.
- The update is recommended for all users of iPhoto '11.