Apple has released Pro Applications Update 2008-01. This update improves reliability for Apple's professional applications and is recommended for all users of Final Cut Studio, Final Cut Server, Logic Studio, and Shake.
Pro Applications Update 2008-01 is a revision to Final Cut Studio 2.0. This update includes Final Cut Pro 6.0.3, Compressor 3.0.3, which addresses specific customer issues, installation issues, compatibility updates, general performance issues and improves overall stability.
This update is recommended for all users of Final Cut Studio 2.0 and later.
Full release notes are available here.