I recently upgraded to Snow Leopard on my Macbook Pro (early 2008) and now my function keys are mixed up. My volume keys are now F3 and F4 for example. I have already unchecked, Use all F1, F2, etc. keys as standard function keys as standard function keys in System Preferences and it didnt fix the problem. Also, under the keyboard shortcuts tab I have clicked the Restore Defaults button. This also didnt fix my problem. Has anyone else experienced this issue?