I am curious what exactly was updated in the Leopard Graphics Update for my MacBook 2.2 Ghz (X3100 graphics). After installing the Leopard Graphics Update, I get the following info in "openGL Extensions Viewer" (http://www.macupdate.com/info.php/id/17087/opengl-extensions-viewer) Does anybody want to run the extensions viewer and see what the driver version is in 10.5.1? I am guessing it is the "latest known" one, 1.5.18. This should confirm whther the X3100 drivers have actually been updated in Leopard 10.5.2. I also wouldn't mind comparing the OpenGL Extensions Viewer benchmarks and compare the FPS in Leopard 10.5.1 and 10.5.2. Does anybody still have 10.5.1 installed who could run the benchmarks to compare with me?