I was setting up my neighbour's new Inspiron laptop earlier on. I went to close an application, so I hit Alt-F4. The application stays open, but the brightness went down. I tried again, and the same. Then I looked down at the keyboard, and was horrified to discover...
That's right folks, Dell has made the laptop specific stuff the primary function of each button. Now in order to access the F keys, you need to hold down Fn.
I hope that at least they will keep this kind of thing exclusive to their cheap models and not mess around with the keyboards of their high end offerings.