Apple Released Series of Updates

iLife Support 8.1.1
This update supports system software components shared by all iLife '08 applications, improves overall stability, addresses a number of other minor issues, and supports general compatibility issues. It is recommended for all users of iLife '08.
http://www.apple.com/support/downloads/ilifesupport811.html

iMac MXM Update 1.0
The iMac MXM Update improves video compatibility with Boot Camp on certain 24" iMac models.
This installer places the iMac MXM Update firmware updater in the /Applications/Utilities folder on your computer. Run the updater in the Utilities folder to install the update. Updating takes only a few seconds.
http://www.apple.com/support/downloads/imacmxmupdate10.html

iDVD 6.0.4
This update improves overall stability and supports compatibility with Mac OS X 10.5.
http://www.apple.com/support/downloads/idvd604.html

GarageBand 3.0.5
This update supports compatibility with Mac OS X 10.5.
http://www.apple.com/support/downloads/garageband305.html