If you use a version of Panther earlier than 10.3.3, then yes, fnSwitch will do the trick. However, now the good news... 10.3.3 corrects this little problem. Look for the Keyboard and Mouse preference pane under System Preferences, and you will see a box to checkmark called "use custom actions for the F1-F12 keys". Apparently Apple thinks using the function keys as, well, function keys, is "custom". Now to use the brightness, audio, etc. functions you"ll have to press the fn key on the lower left. But Exposé will now work normally, which to my mind is far more useful!