If you're the happy owner of a 2.2/2.4GHz MacBook Pro then Apple has a present for you: MacBook Pro Software Update 1.2. What does this update do you ask? Well, curiosity killed the cat which is why Apple keeps the release notes about this update terse. I'll reproduce them in their entirety for your enjoyment, "This update improves graphics stability and is recommended for all MacBook Pro (Mid 2007, 2.4/2.2GHz) computers running Mac OS 10.4 Tiger."
That's all she wrote, folks.