I don't know if I accidentally did this somehow, or if it has something to do with installing Lion, but now every time I press the Fn key on my white macbook, it performs the 'Show All Windows' action, which displays every window open in the same app. That's all well and good, but it means I can't forward delete anymore, so I desperately need to remove this 'Show All Windows' shortcut so I can get back to forward-deleting! I've looked through all the keyboard shortcuts in the system preferences and can't find anything. Can anyone help? Thanks.