Apple released an update for iLife and iPhoto. The iLife Support 9.0.1 and iPhoto 8.0.1 are recommended for all users.
Apple also released updates for the AirPort Client and Utility. The updates: AirPort Utility 5.4.1 and AirPort Client Update 2009-001. AirPort Client Update 2009-001 addresses issues with roaming and network selection in dual-band environments.
The updates are available from Apple Software Update.