I have some problems with my keyboard shortcuts. The media keys are working fine. If I choose the "Use all F1, F2, etc. keys as standard function keys" in keyboard preferences then as expected I activate them by holding the Fn key and pressing the media key. If I uncheck the "Use all F1, F2, etc. keys as standard function keys" in keyboard preferences then as expected I activate them by just pressing the media key. But the Expose keys aren't working. I have them set as defaults (F9=all windows, F10=application windows, F11=desktop) and Expose is switched on. However if I press them, I just hear the alert sound and nothing happens. This is the case regardless of how I have set the media keys to function (as described above). In Expose preferences, if I change these Expose functions to any function key from F1 to F19, I still only hear the alert sound. But if I change the expose functions to the right or left Shift/Ctrl/Alt/Option keys, they work fine. Of course activating expose whenever I hit the shift/ctrl/alt/cmd key is ridiculous, I want to use F1-F19. Any advice would be much appreciated.