Same here Im using a 17" 2.33 Duo 2 with M-Box 2, Pro Tools LE 7.3.1 cs2 and OSX 10.4.9, and everything is groovey baby......with the exception of Quick Time 7.1.6 which I know boat loads of people have had problems ever since updating to QT 7.1.6, but thats not just Pro Tools users, it seems to be across the Mac-World by the looks of things, apple may have abit of botty licking to do