I have the same problem with the dock becoming non-responsive. I also believe this is a software problem and not a malfunctioning keyboard. I don't think that they worked out all the issues with previous model Macs.
As a note I and many other have installed the update (1.1) and played with all the setting for both Expose/Dashboard and Keyboard/Mouse. Nothing will get the buttons to work as they have been designed; (without the use of the fn key). I also still have the problem with NO keyboard response at the rEFIT boot screen, which means that it's more than just an inactive "option" key. It's a completely not functioning keyboard.
Update: Ok, to prove my point I just disabled my rEFIT boot and rebooted my computer. I held down the Menu button on my apple remote and I was presented with the standard "boot camp" drive selection screen; Windows XP or OS X. I then tried selecting the drive with the keyboard arrows as I would normally do; nothing happened. I then tried switching the selection between XP and OS X with the arrow buttons on the remote and it worked fine. I then tried accepting my selection using the "return" key on the keyboard and nothing happened. I then accepted the selection of the OS using the "play" button on the remote and it worked. So it's more than just a non functioning "option" key.
As a note I and many other have installed the update (1.1) and played with all the setting for both Expose/Dashboard and Keyboard/Mouse. Nothing will get the buttons to work as they have been designed; (without the use of the fn key). I also still have the problem with NO keyboard response at the rEFIT boot screen, which means that it's more than just an inactive "option" key. It's a completely not functioning keyboard.
Update: Ok, to prove my point I just disabled my rEFIT boot and rebooted my computer. I held down the Menu button on my apple remote and I was presented with the standard "boot camp" drive selection screen; Windows XP or OS X. I then tried selecting the drive with the keyboard arrows as I would normally do; nothing happened. I then tried switching the selection between XP and OS X with the arrow buttons on the remote and it worked fine. I then tried accepting my selection using the "return" key on the keyboard and nothing happened. I then accepted the selection of the OS using the "play" button on the remote and it worked. So it's more than just a non functioning "option" key.