Apple has issued an 85MB update for Final Cut Pro 5.
Final Cut Pro 5.o.4 is simply described as "providing improved reliability".
System requirements: a G4/500MHz or faster desktop or G4/550MHz or faster PowerBook; AGP or PCI Express-based graphics and 512MB RAM.
The company has also issued a 41.6MB update for Soundtrack Pro, raising that to version 1.0.2.
Apple has revealed no details whatsoever pertaining to the content of that update.