Apple posted the Pro Application Support Update 4.0.1 on Monday. The update "improves general user interface for all users of Final Cut Studio, Final Cut Pro, Motion, Soundtrack Pro, DVD Studio Pro, Aperture, Final Cut Express HD, Soundtrack, Logic Pro and Logic Express," according to Apple.
No additional information was provided by Apple. The Update is 7.6 MB and requires Mac OS X 10.4 or later.
Users who do not have any of the named software above installed will not see the update in System Preferences/Software Update.