Apple has released several software updates today, including: iLife Support 8.1.1 (improves overall stability, addresses a number of other minor issues, and supports general compatibility issues); iDVD 6.0.4 (improves overall stability and supports compatibility with Mac OS X 10.5); and iMac MXM Update 1.0 (improves video compatibility with Boot Camp on certain 24" iMac models.)
