I have not been fortunate enough to own the new aluminum Apple keyboard. However, I’ve read some stuff online that folks are having issues with a couple of the Function keys. Specifically, these are F3 and F4. Apple released a keyboard update, which doesn’t seem to fix the issue. However, Nik Fletcher at The Unofficial Apple Weblog has come by some instructions on how to resolve this situation. It worked for him. And it may work of your. So, instead of waiting for Apple to release another update, check out Nik’s post and take matters into your own hands.