Apple just released version 10.3.7 of Mac OS X. Among the changes:

• Addresses an issue with Blizzard World of Warcraft in which the game's frame rate could drop considerably when in "Ghost mode," if the computer uses an nVidia graphics card.
• Resolves an issue in which enabling Vertex Shaders in World of Warcraft could lead to unexpected graphics issues when using an nVidia graphics card.
• Addresses an issue with World of Warcraft in which incorrect colors or unexpectedly flashing objects could appear when using an ATI Radeon 9600 graphics card, making gameplay difficult.

Blizzard's World of Warcraft came out on the 23rd of November - less than a month ago. I find these fixes quite striking, both because of Apple's speedy reaction (more speedy, alas, than their fix for the intermittent internet problems I've been having), and for the fact that they would do so for one game.